I know you are disappointed I didn't do the crossover. I originally planned to but when I think about it, it wouldn't be much different, asides from the addition of Patty, who would most likely only be disapproving of Oliver's extreme methods but probably not to the same extent as Joe and Wells and she'd probably be more serious in the second half of the crossover, where Harkness would be involved. I've been considering what could be changed with the inclusion of Patty but then I figured that not much really but that's just my respectful opinion.

If you guys think Patty could do more in the crossover, well, I'm all ears, I'd certainly be entertained to know how others would handle it.

Disclaimer: I do not own DC Comics or the CW TV shows Arrow, The Flash, Legends of Tomorrow, Supergirl or any other characters or elements pertaining to the mentioned franchises.


"Gosh, I can't believe you really bought that." Patty said, as she unwrapped the gift to reveal the teddy bear.

"I remember you mentioning your Dad bought it to you, when you were a kid." Barry said as they kissed.

"Merry Christmas, Barry."

"Merry Christmas, Patty."

"I think I can bring into S.T.A.R. Labs Grandma Ester's eggnog. That should help." Barry said.


Later, S.T.A.R. Labs

"Merry Christmas." Barry said, handing Caitlin, Cisco and Wells the presents from the bag. "Just a small token of my gratitude for everything you guys have done for me."

"I think I speak on behalf of my colleagues when I say you've been a gift for us, Barry." Wells said as Barry pulled out a thermos flask from the bag.

"What's that?" Caitlin asked.

"This is compliments of Iris. Grandma Esther's famous eggnog." Barry said.

"It kind of has weird taste at first but you're going to enjoy it." Patty said.

"That's what I'm talking about." Cisco said.

"Ahem. Maybe later for me. Wouldn't wanna drink and drive." Wells said, looking grumpy as he drove off, much to Barry's and Patty's confusion.

"What's wrong? Is it the gifts?" Patty asked.

"No." Caitlin shook her head, her and Cisco looking solemn before it hit Patty.

"Oh. Christmas." Patty said and Cisco nodded.

"This used to be his favorite time of the year but the accident happened before Christmas, so it kinda ruined the holidays." Cisco said.

"I'm gonna go get him a present. Maybe that will cheer him up." Caitlin offered as she picked the present from Barry. "Thank you very much."

"Yeah." Barry nodded.

"Merry Christmas, guys." Patty said.


Later, Central City

Caitlin was going out from the mall after buying presents, talking on the phone with Cisco.

"It was that or Stephen Hawking's new autobiography and we both know how he feels about Hawking. OK, I'll talk to you later. Bye, Cisco." She hung up before noticing someone was sneaking up on her as she was nearing her car but as she looked into the reflection on the window, she couldn't believe her own eyes. He had longer and unkempt hair but…

Caitlin turned around as the man was walking away, while she followed him. As he stopped at the corner, Caitlin stared in disbelief as his hands and head flamed on and the man turned around to reveal her reportedly deceased fiancé's face. Caitlin walked away and stared in shock, processing what she just saw.


Later, Mercury Labs

The police answered to the breaking and entering as Barry and Patty were examining the dead guards.

"Hey. What are you thinking?" Joe asked.

Barry and Patty got up.

"The blood splatter patterns and trajectory of the remains... only a high-speed collision could have done this." Barry said.

"But this is tight area. There's no way one can do such damage to a human in this space, unless he was moving really fast somehow." Patty said.

"Get this." Eddie said as they turned to him. "The witness says all he saw was a blur. Sound familiar?"

Barry, Patty and Joe looked at each other in shock before approaching the witnessing scientist.

"You saw a blur? What was it?" Barry asked.

"Whatever it was, it was looking for something." The scientist said, clearly still in shock.

"Can you describe this blur? What did it look like?" Patty asked

The scientist took a breath. "Uh… like a man... in some kind of yellow suit."

Barry, Patty and Joe tried to mask their shock.

"OK." Barry said before he, Patty and Joe went aside before Joe grabbed them both. "We have to check our files. Joe, you heard him. The man that killed my mom, he's back."

"I know. He's been in town for a few weeks now." Joe said.

"Wait, how do you know that?" Patty asked, her and Barry confused.

"He paid a visit to me at the house. He took the evidence from your mom's case. The files are gone." Joe said.

"Why wouldn't you tell us this sooner?" Barry demanded.

"I couldn't." Joe said.

"Why?" Barry asked.

"Because he threatened to kill Iris." Joe said with a terrified look, much to their shock.


Later, S.T.A.R. Labs

"The witness described seeing a yellow blur. Just like the one that killed Barry's mother." Joe said.

"Then we need to get cracking and stop this speed psycho." Cisco said before shaking his head. "That... I wasn't trying to give him a name."

"Whatever he wanted in Mercury Labs, according to the witnesses, he killed security guards to get to it. The crime scene was a floor with highly secured vaults." Patty said.

"Well, whatever it was, he wanted it badly enough to kill for it." Wells said.

"Doctor, what do you know about this Mercury Labs?" Joe inquired.

"Mercury was one of S.T.A.R. Labs' major competitors until our little setback and then..." Wells clapped his hands. "…it catapulted to the forefront, led by..." He showed a photo on the monitor. "...Dr. Christina McGee, brilliant but egocentric physicist."

"It says here Dr. McGee has secured half a billion dollars in private funding to develop, and I quote, 'prototypes for the technology of the future.'" Cisco read.

"Well, I'll be..." Wells seemed intrigued. "Tina's messing with tachyons." Joe turned to him with a confused look. "Superluminal particles." Wells explained.

"Of course." Joe said, although he obviously still had no idea. "So, what could someone do with one of those..."

"Tachyons." Wells said.

"Thank you." Joe nodded.

"Well, I don't know." Wells sighed. "Become invincible. If you could devise a matrix stable enough to harness their power, you could..." He hit his fist onto his hand. "…travel faster than light."

"He's gonna try to get them again. So, we need to get what Mercury has and use it as a lure." Barry said.

"Exactly right." Wells nodded. "Cisco, Caitlin, let's start engineering a trap."

"You got it." Cisco said.

"Of course." Caitlin nodded as they left.


Later, Jitters

Iris was serving coffee as Caitlin approached her. "Iris."

"Caitlin. What are you doing here?" Iris asked as she was picking coffee from a counter.

"Oh. It's been a long day." Caitlin sighed.

"It's only noon." Iris said, confused.

"I didn't sleep much last night." Caitlin sighed.

"Well, me, either." Iris said, pouring some coffee, while serving it.

"Um, so I was catching up on your blog and this story caught my eye about a man whose head and hands burst into flames." Caitlin said.

"The Burning Man." Iris realized.

"Yeah." Caitlin nodded.

"I haven't really updated that story in a while, but there are some reports I could send you." Iris offered.

"That'd be great. Thank you." Caitlin said.


CCPD

"Barry Allen. And this is Detective Patty Spivot. Thank you for coming in." Barry said as they shook hands with Dr. McGee.

"Dr. Tina McGee. I assume this is about last night's break-in?" McGee asked.

"Yes and no." Wells said ominously.

"That's usually how things are with you, aren't they, Harrison?" McGee glared at him.

"We think that whoever broke into Mercury Labs wanted one of your prototypes." Patty explained.

"You'll have to narrow that down. We have literally hundreds of projects in development." McGee said.

"One containing tachyonic particles." Barry said.

"We've had encouraging success with tachyons, yes but there's still a significant gap between our prototype and any real-life application." McGee nodded.

"We're trying to catch whoever broke into Mercury Labs and we were hoping we could use your prototype as a bait." Patty said as they glanced at Wells.

"Us? You're assisting the police now, Harrison?" McGee asked Wells, sounding skeptical.

"I'm a consultant on this particular case." Wells said. "Listen, Tina, once this man is apprehended, your prototype will be promptly returned. You know nobody wants to ensure the future's technology more than me."

"Mr. Allen, Detective Spivot, I appreciate the CCPD's concerns but Mercury is quite capable of protecting its own assets." McGee said. "Good luck with your manhunt." She left as they were considering their options.


S.T.A.R. Labs

Caitlin was just staring as Cisco was trying to show her his suggestions on how to catch the speedster but she seemed to be ignoring him.

"Are you OK?" Cisco asked, upon noticing how contemplative she looked, not even listening to him.

"Ronnie's alive." Caitlin revealed, much to his surprise. "I saw him, Cisco. I think he was following me—"

"Caitlin. Ronnie died. He was vaporized in the accelerator when it went critical." Cisco said, thinking Caitlin was in denial.

"Ronnie's alive, and he's out there, alone and scared. And I need your help to find him." Caitlin said as Cisco considered.


CCPD

Barry was staring at the board on the evidence of his mother's murder, contemplating.


Fourteen years ago

"Ouch." Young Barry said as Nora was wiping his face.

"Your bruise is already healing." Nora said.

"Still hurts, though." Barry said.

"Not for much longer, honey. Here, come on." Nora put a blanket on Barry as he laid down. "I'll keep the light on for you."

"Were you ever afraid of the dark?" Barry asked.

"If I turn this light off now, would you be scared?" Nora asked.

"No." Barry shook his head.

"That's because I'm here with you." Nora assured him. "See, you're not afraid of the dark, Barry. You're afraid of being alone in the dark. And that goes away when you realize something. You're never really alone."

Barry smiled as Henry entered.

"Time for bed." Henry said.

"I'm thirsty." Barry said.

"Ah, now you're stalling." Henry said as he leaned onto the bed. "But I got you covered, buddy." He kissed Barry on his forehead. "Good night, slugger."

Nora leaned on and smiled. "Sweet dreams, my beautiful boy." She kissed Barry on his forehead as they smiled at each other.

"You can turn off the light." Barry said as Nora flipped the switch and turned off the light.


Suddenly, Barry heard some thunder as he came to and saw that the water in his aquarium was floating in the air. Barry went downstairs and saw his mother on the floor, screaming, surrounded by red and yellow lightning as Nora screamed.

"Mom! Mom!" Barry wailed.

"Nora!" Henry called out.


Present, CCPD

"Barry."

Barry turned to see Patty as she neared the board.

"Fourteen years and now we have a lead." Patty said. "Why would he show up now?"

"I don't know." Barry shook his head.

"Barry…" Patty took a breath. "We'll find a way to stop this guy and clear your father's name. I promise you that." She held Barry's hand as he nodded.

Barry then approached the window and leaned onto the windowsill before he noticed a man in yellow suit standing on the opposite rooftop, realizing who it was.

"What is it, Barry?" Patty asked before noticing the man in yellow. "Oh, my God…"

The man in yellow sped off with red lightning.

"Barry, wait, don't—" Barry sped out from the lab before Patty could stop him. "Barry!"


Central City

Barry chased the man in yellow before facing him in an alley as Barry stared in disbelief.

"It was you. You were the one in my house that night." Barry said as the speedster was vibrating his face and his eyes glowed red. "You killed my mother! Why?!" He demanded, trying to understand.

"If you wanna know that, you're gonna have to catch me." The speedster taunted, vibrating his voice.

Barry chased after the speedster, running across the city. The speedster seemed much faster than him as Barry was barely able to keep up until they ended up in a football stadium as lights turned on and Barry and the speedster were facing each other.

Barry and the speedster rushed at each other but the speedster knocked Barry down on the ground as Barry stared at the man in yellow.

"Not fast enough, Flash." The speedster gloated before they both got up and ran through the stadium.

Barry and the speedster exchanging blows but it was obvious that the speedster was more skilled than Barry and was playing with him as the speedster knocked Barry down on the ground as they returned to the playing ground. The speedster kicked Barry, sending him rolling away as Barry stared at the man in yellow.

"Who are you?!" Barry demanded, not understanding.

"You know who I am, Barry." The speedster said. Barry got up, attempting to punch him but the speedster was much faster and more skilled than him, beating him and knocking him down on the ground again.

Barry got up, glaring at the man in yellow. "I don't know who you are!"

"But you do, Barry. We've been at this a long time, you and I. But I'm always one step ahead." The speedster gloated. Barry attempted to punch him but the speedster lazily dodged before slapping him in the chest and then getting behind him and pinning him down to the ground. "It is your destiny to lose to me, Flash. Just as it was your mother's destiny to die that night."

The speedster sped off as Barry stared, wondering what the hell just happened as he laid down, groaning in pain.


Later, S.T.A.R. Labs

"He acted like he knew me, like we'd done this before." Barry said, filling Joe, Patty and Wells in.

"He was antagonizing you, Bar." Joe said.

"I would get close, and he'd just pull away. This was just some sick game to him." Barry said.

"You'll catch him, we'll help." Wells offered.

"No, you don't get it, all right?" Barry shook his head. "His speed, it is… it's beyond me. I'm not the fastest man alive. He is. So how do we catch somebody that even I can't keep up with?" He demanded, clearly agitated from being beaten by the man in yellow, who had murdered his mother.

"The beautiful thing about force fields, Mr. Allen, is they're impervious to speed." Wells said. "Now, we're almost finished fabricating the trap. All that remains is for Detective West to procure the bait."

"I'm on it." Joe nodded as Barry and Patty were about to follow him. "Barry, why don't you stay here?"

"No, Joe, today is not the day to tell me to stay behind." Barry said as Joe and Patty sighed, knowing he was going to react like that.

"Just be careful, Barry." Patty said.


Later, CCPD

"If Judge Hank was gonna sign this, he would've done so already." McGee said as Joe showed her the search warrant.

"Look, I'm sure you don't want this investigation to get any more public than it's already been, do you, Doctor?" Joe argued.

"This has Harrison Wells written all over it with big black letters. I am not giving you my tachyon prototype." McGee snapped.

Barry took a breath as he tried a different tactic. "It was quite the tour of your facility, Doctor." He said. "You were fine to let us dumb cops walk around but I majored in physics and chemistry and I saw a lot of stuff that Science Showcase Magazine would love." Joe and Patty threw him surprised looks. "So should I call their editors directly, or just leave a few posts on their website?"

McGee glared, realizing she had been pushed into a corner. "You'll have the tachyon device within the hour. I see why Harrison holds you in such esteem, Mr. Allen. You're very much alike." She told Barry coldly before leaving.

"Blackmail? Really?" Patty asked, mix of disapproval and surprise in her eyes.

"Desperate times…" Barry shrugged.

"Nicely done." Joe said.


Central City

Cisco and Caitlin were walking down the service tunnels underneath the mall, with Cisco having in his hand some detector.

"We follow the ionized particles, and that should lead us right to him. The CPM's are increasing. We should have told Dr. Wells and Barry." Cisco said.

"No, not until we're sure it's him." Caitlin said, holding a flashlight.

"Oh, wow." Cisco stared at the readings.

"Look, Ronnie is not like you remembered him." Caitlin said hesitantly.

"What does that mean?" Cisco asked, confused.

"Just don't freak out when you see him, OK?" Caitlin pleaded before Cisco's detector suddenly turned off.

"Oh, I really wish that was because the batteries are dead." Cisco grumbled. They continued walking down the corridor until they saw Ronnie as Caitlin shined a flashlight at his face but Ronnie just stared back blankly.

"Ronnie? Ronnie. It's me. Cait." Caitlin pleaded but Ronnie was silent, not recognizing either her or Cisco. "Look, I brought Cisco with me. We're here to help you. You were in an accident. Do you remember?"

"I'm not Ronnie." Ronnie said.

"Yes, you are. You're Ronnie Raymond." Caitlin tried.

"I'm not Ronnie. I told you that. Now get away from me." Ronnie growled.

"Look, we need to take you back to S.T.A.R. Labs. We'll help you remember who you are." Caitlin held his hands. Suddenly, Ronnie grabbed her by her cheek as Caitlin gasped.

"Firestorm." Ronnie whispered before his head and hands were on fire as he ran away, while Cisco and Caitlin stared.


Later, S.T.A.R. Labs

"The tachyon device is in place." Cisco said as they set up the trap.

"You think it'll work?" Barry asked.

"It'll work." Cisco said.

"We have a bait. How do we lure him here, though?" Patty wondered.

"We'll take care of that." Wells said, crossing his arms as he and Joe were eying Barry apprehensively.

"What's the problem?" Barry asked upon noticing their looks.

"Is everything OK?" Patty asked.

"Look, Barry..." Joe took a breath. "Me and Dr. Wells have spoken and we think it would be best if you weren't here for this."

"What are you talking about?" Barry demanded.

"You think Barry's too close to the case." Patty realized as Joe nodded.

"Maybe you're not close enough." Barry snapped. "If you hadn't been too scared and warned me weeks ago, I could have been prepared for this."

"Barry, that's not fair. What would you have done in Joe's place if he had threatened your Dad?" Patty argued.

"Patty's right. I think we can all appreciate Joe's concern for Iris, Barry." Wells nodded.

"That's why I have to be here! I'm the best chance at catching this guy!" Barry exploded.

"Not right now, not in this state." Joe argued calmly.

Barry took a breath, trying to keep his tone leveled. "This man stabbed my mother through the heart and sent my father to prison for it. This is my fight!"

"Barry, we all understand how you're feeling, believe me, we do." Patty pleaded. "But you're not thinking straight. All we want is to be sure we'll do this carefully and the right way. You said it yourself, the man in yellow wiped the floor with you."

Barry sighed as looked at Joe, Wells and Patty before he picked his jacket and left, frustrated.


Caitlin was at the Pipeline, holding in her hands her engagement ring, while sniffing before Cisco sat next to her. "Caitlin ...don't worry. Hey." Caitlin turned her head to face him. "Now that we know he's out there, we will find Ronnie again." He promised.

"Why?" Caitlin asked as she turned to the Pipeline. "So we can throw him in there with all the other metahuman psychos?" She lowered her head, on verge of tears. "I used to play this game in my head. What would I give up for just one more minute with him? My house, my career, the rest of my life? Today I finally got that minute. And I wish I hadn't." She sniffed, as a tear rolled down her cheek. "Seeing him like that, what he's become... Dear God... I wish he had just died that day." She buried her face into her hands, sobbing as Cisco hugged her, providing whatever little comfort he could for his best friend.


Iron Heights

Barry was in the visitor room as Henry approached him, glass separating them both as they picked the receivers.

"Merry Christmas, slugger." Henry said.

"Merry Christmas." Barry said.

"You alright, Barry?" Henry asked, noticing the look on his face.

Barry sighed, looking ashamed. "I screwed up, Dad." Henry looked confused. "After years of searching, I finally found him. I found the man, who killed Mom. The man in yellow, the one in the lightning. He's out there, and I had him. He got away." Henry's face twitched and hand shook, looking like if he was about to break down. "I was so close. I promised you that I would get you out of here. Every day you spent in here has been because of him. Until today." Barry's voice started to break as he felt ashamed. "Now you're in here because of me, and I'm so sorry." He started to sob as he wiped his face.

"Barry. Barry. This is not your fault. Look at me." Henry said as Barry was trying to keep his tears at bay. "I know what you've given up. Every decision you've made the past fourteen years has been because of me and your Morn. What you studied, why you became a CSI. And Patty."

"Patty?" Barry asked, confused.

"You're my son. You don't think I know how you care about each other?" Henry said. "But you two have never tried. You were too consumed with what had happened to me and your mom to let yourself have a life. Well, let it go now, Barry. Hear me now." Barry got ahold of himself, listening. "The man in the yellow suit... he's taken enough from us already. Don't let him take any more."

Barry stared and considered Henry's thoughts.


Later, CCPD

Patty was at the desk, filing some cases before Barry sat next to her.

"Barry. Are you OK?" Patty asked.

"Yeah. I just… have been having a lot on my mind." Barry said, putting his hands together.

"What's going on?" Patty asked. "Barry, whatever it is, if you need to get something off your chest, I will listen. I'm always here for you." She held his hand.

"For as long as I've known you, ever since our first day in CCPD…" Barry took his breath. "…I admired you. I mean, you were unlike any other woman I had met. Smart, kind and even if… you didn't believe me about the man in yellow, you've always been there for me."

"Because I knew that you were a good person. I could tell." Patty said.

"I had not imagined how our lives would have gone down back then. And today Dad made me realize… I want more, Patty." Barry said as Patty blinked. "I realized that I didn't want to admit to myself that I had found what I had been looking for my whole life. Ever since Mom… I had this… void inside me. And now I realize… when I'm with you… I don't feel that void." He breathed out. "And you always help me get back on my feet, when I'm down. When I feel beaten, you're there for me."

"Barry… I…" Patty paused, trying to think of what to say. But the next thing either of them knew, they sat down and kissed.


S.T.A.R. Labs

Wells, Cisco, Joe, Eddie and CCPD were setting up the trap until they caught the speedster in yellow as Joe, Eddie and the SWAT entered.

"Cisco! Lights!" Wells called out as the lights turned on as Eddie and the SWAT stared at the speedster before Wells turned to Eddie. "Detective Thawne? Would you like to read him his rights?"

Eddie stared in disbelief at the man in yellow before he saw Joe near him. "Joe, what are you doing?"

"Getting some answers." Joe said. "14 years ago, you murdered Nora Allen. I wanna know why. Why?"

The speedster ignored them as he turned to Wells. "Dr. Wells, we meet at last."

"What do you want with the tachyonic particles?" Wells asked.

"My goals are beyond your understanding." The speedster said.

"Oh, I don't know. I'm a pretty smart guy." Wells said. "I knew you were exceptionally fast. So, any trap we manufactured, would have to be invisible. I knew your cells could repair themselves at extraordinary speed so you could withstand the damage this is doing to your body right now."


"The supercapacitors, the containment field is fluctuating. They need to get out of there now." Cisco said, noticing the readings.


"The reason I know all this is because your powers are almost exactly like those of the Flash." Wells continued.

"Oh, I'm not like the Flash at all. Some would say I'm the reverse." The speedster said.


The screens started buzzing, much to Cisco's and Caitlin's shock.

"Dr. Wells, evacuate. Get out of there now. Dr. Wells!" Caitlin called out.


The man in yellow grabbed Wells and slammed him to the ground inside the trap before he started beating him up.

"Cisco! Turn off the barrier!" Joe ordered.

"If I turn it off, that thing's gonna get out." Cisco protested.

"Cisco, he's gonna kill Wells!" Joe shouted as he grabbed a wrench and smashed the console as the trap turned off. The speedster grabbed the device and sped off, leaving Wells on the floor, bloodied.

"Find him!" Eddie ordered, looking around before the speedster appeared behind them. Eddie, Joe and the SWAT aimed their weapons at the speedster.


CCPD

Barry pulled away as his phone went off.

"What is it?" Patty asked.

"It's Caitlin." Barry said as he read the text.

"S.O.S."

Suddenly, Barry sped off as Patty got up and picked her coat.


S.T.A.R. Labs

"Don't move or we will shoot!" Eddie warned as he and the S.W.A.T. aimed at the speedster. The speedster knocked down the officers before disarming Eddie, his face inches away from him as Eddie paled. Joe fired at the speedster, who shoved Eddie before grabbing him by his throat.

"I warned you not to hunt me." The speedster snarled before Barry engaged him and they sped up through the window before the man in yellow threw Barry against a car as Barry crashed against the windshield, while Cisco and Caitlin went out. The speedster again managed to overpower Barry and beat him up as Cisco and Caitlin stared in shock.

"Barry!" Caitlin wailed.

Patty drove in and went out as she aimed her gun. "Hey! Let him go!"

The speedster turned around and quickly disarmed Patty before grabbing her by her throat as Patty choked out.

"You've become a nuisance, Detective Spivot. One I cannot tolerate." The speedster said as he vibrated his hand.

"No!" Barry snarled, rushing at the speedster, causing for him to let Patty go but the speedster again slammed him to the ground before a torrent of fire knocked the man in yellow down as they stared in shock to see Ronnie.

The man in yellow got up. "Our race is not yet done. See you soon, Flash."

The speedster sped off in red lightning as Cisco and Patty helped Barry on his feet.

"Are you OK, Barry?" Patty asked.

"I'll be fine." Barry nodded.

Caitlin stared in shock as Ronnie neared her. "Don't look for me again." He said before he flew up and away as they all stared in disbelief, while Barry seethed at where the man in yellow was.


Later, CCPD

"Are you OK, Barry?" Patty asked.

"I should be asking you that question." Barry pointed out as she massaged her throat.

"A little banged up but I'll be fine, even though I don't heal as fast as you." Patty said. "He almost killed me and Eddie."

"We're lucky he didn't." Barry said. "But when he was about to…" He took a breath as he looked at Patty. "I can't imagine a world without you, Patty. I need you in my life."

Patty just smiled as they kissed each other again.


S.T.A.R. Labs

Wells entered his private room, attaching some device into the yellow suit of the speedster before he turned on the pedestal with the hologram of the newspapers of the Flash vanishing and then he looked at the photo of Patty, glaring. There were still some problems he needed to take care of but direct approach was clearly not going to be the one.


So, what do you guys think?

Please review and let me know if you have been enjoying this and want for me to continue.