Danny sighed as he took in a deep breath, allowing the sunlight to absorb into his pale skin as he watched the city pass. He was almost there- his favorite cousin's and his cousin's roommate. Oh, and his cousin and the roommate happened to be genius scientists.

He and his cousin had much in common- such as their love of comic books, and Star Trek. His roommate was the same, but Leonard told Danny over online chat that he was stubborn and annoying, but entertaining in his own way. Leonard liked hearing from Danny over the internet- just what was up at school...And ghosts.

You see, Danny had told Leonard over chat that he was Danny Phantom, and over Skype showing him he was. Leonard was shocked, to say the least- but supported Danny and kept his secret. He enjoyed mentally mocking Sheldon for actually having a superhero relative. He knew he could never tell Sheldon, but, oh my gosh, the jealousy that Sheldon would harbor...

Leonard was pleased about his visit, and was probably getting ready at the moment with his usual inflatable beds that always seemed to last longer than told.

And all the while, Danny worried about Amity Park, he hoped that Valerie or the G.I.W. could take care of it for a few days. Right now he was in Los Angeles, the 'City of Angels'.

City of Angels? Yeah, right. It was mostly concrete jungle, with tall skyscrapers for offices. He also saw many, various worn-out buildings and billboards. The occasional odd building here and there, and he passed Dodger Stadium, and into a street of apartments. Pulling into the parking lot, his dad smiled. "Alright, guys! We're in L.A.!" Jack shouted, and jumped out along with Maddie.

Jazz and Danny took a slightly sluggish-er approach and yawned, stretching from the long car ride as they tumbled out. Jazz turned to Danny as they began to approach the building. Whispering to Danny so the parents wouldn't hear anything, she whispered "So, Leonard knows?" She asked, concerned. Danny whispered back. "Yeah. He won't tell anyone, though." He finished. Jazz looked a little exasperated at him, and they heard Jack groan at the perpetually broken elevator, and they all went up the stairs.

"...So, your relatives coming to visit are Ghost Hunters?" Sheldon asked in his typical, slightly robotic tone. (AN: If you've watched the series, you know how he is. I don't think I can really describe him well in a fanfic.) Leonard groaned and looked up from the air beds he just finished putting out.

Sheldon was a tall guy- he had an inverse Flash shirt on. He had short hair to match- brown, as well. Leonard was a bit short- he had dark brown hair, with glasses. He had a green hoodie on.

Their apartment was scattered with various superhero stuff, including one or two posters of Danny Phantom. There were also whiteboards for drawing equations for scientific questions out. Sheldon had put a paper on his seat on the couch that said 'Sheldon's Spot ONLY- notice for the Fentons.'

"Yeah, Sheldon. That's the twentieth time you've asked today." He said, a little exasperated. Sheldon grinned a bit.

"Maybe they'll know something about the superhero, Danny Phantom." Sheldon said, bringing his hand to his chin.

Leonard chuckled silently to himself. "If only you knew..." He thought.

A knock interrupted them, and Leonard got up and went to open the door. He was assaulted by hugs, with the exception of Danny, who just gave him a high-five. Jack grinned.

"Hey, Leonard! How's my nephew doing?" Jack said, putting a hand on Leonard's shoulder. Leonard smiled. "Good, Uncle Jack."

Maddie and Jazz greeted him as well, while Sheldon sat back, not really the touchy-feely type. Then Jack approached him. "Oh, you must be Sheldon, Leonard's roommate. Pleased to meet you." Jack said, shaking his hand. Sheldon returned it a little reluctantly, earning a strange look from Jack. Maddie shook hands as well, and did Jazz. Danny did, too.

"So, wanna hear Maddie and I blabber on about ghosts?" Jack asked. Sheldon nodded enthusiastically, and sat down in his spot on the couch, forbidden from anyone else's bum. Pulling off the paper, briefly showing it to the Fentons, who politely nodded, a bit weirded out from the notice as he set it aside onto the coffee table.

"Well, Danny and I are gonna hang out for a while." Leonard said. Maddie and Jack nodded, and Sheldon turned to look at Danny again...And froze as he watched him walk down to Leonard's room.

"Not...Possible..." Sheldon thought numbly.

Leonard's room was fairly neat- clothes sorted into the closet, ect. The wall was blue, the floor beige.

Closing the door behind him, Leonard turned to Danny.

"So." He began.

"So?" Danny asked.

"You know what I want to see." Leonard said with a smirk, leaning against the wall. Danny groaned, but the two rings formed and separated.

Leonard stared at Danny, shocked for a moment, before snapping out of it as Danny turned back. Leonard grinned.

"I saw it on skype, but it still shocks me to see it with my own eyes. It's so cool I'm related to a superhero! But, do your parents know?" Leonard asked. Danny winced.

"No, but Jazz does." Danny said, a little sheepishly. Leonard's eyes widened again.

"Dude, you have to tell them!" Leonard hissed. Danny snorted. "Hello? Me? Half-Ghost, My parents? Ghost hunters. Put two and two together." He said blankly. Leonard's eyes narrowed.

"Well, I understand, but still, man. I'd tell them. And I'm gonna keep bothering you about it until you do it. I can't tell them; it's your job." Leonard said. Danny sighed. "I'll tell them when I'm ready- just not now." Danny said, a little solemnly. Leonard softened at that and nodded.

"Oh, and Danny..."

"Yeah?"

"Please don't kill me..."

"Why?"

"My girlfriend mayyyyy have found out your secret by accident."

"What?!" Danny hissed. Leonard frowned.

"Sorry, man. She was looking through my files when she was over here one night when I wasn't looking- and came across that video I saved of you transforming. And she read some of our previous chats...She promised not to tell." Leonard promised. Danny groaned, and ran his hand through his jet-black hair.

"Well, it's not exactly your fault...Can I at least meet her?" Danny asked. Leonard nodded. "She lives across the hall. Here, she'd be happy to meet you. C'mon." He said, and opened the door.

They passed through the living room, and out to the hall.

They didn't notice Sheldon's eyes following them. Sheldon was extremely suspicious of Danny right now, and, slightly ignoring the Fentons, he was left to his own thoughts.

"He looks just like Danny Phantom...His voice is nearly the same as Danny Phantom's on T.V. Don't the Fentons live in Amity Park? Doesn't Danny Phantom usually fight in Amity Park? That, and his parents are ghost hunters...Could he be Danny Phantom?" Sheldon asked himself mentally as he watched the two's retreating feet.

I don't own DP, Skype, The Flash, or the Big Bang Theory. Please R&R! And, there's a reason why this isn't in the x-over section. I find a greater chance of it getting read if it's in one category.