A/N: I think we're at the end for now. I've got a bunch going on and no real story ideas for this one. If I get one I can always continue it or start a sequel. I know, I never have, but one day I might. When the ideas leave, they leave.

Disclaimer: I don't own Chuck.

"What's up with Casey?" Grissom asked Chuck. Chuck had his head buried in one of the exercise bike's motherboards. It wasn't properly transmitting the info required for Sarah's reports, and Chuck was certain he could figure out the problem.

"He's got a mission, a big one, and if it goes right, he is off of Jeff duty," Chuck replied, thinking he had found what he was looking for. "GOT IT!"

Sarah's tablet lit up with the information she needed. "Thanks, babe," she said, grinning.

"Babe?" Grissom asked, giving the two of them a look. "You two are so domesticated it's not even funny."

"That's the nicest thing you ever said, Grissom," Chuck replied, a smile on his face. "Looks like it's going to be a quiet day." Grissom shot him a dirty look. "What? It's not like the three of us are involved with whatever Zondra and Casey are doing."

"Isn't there something in Morgan's book about saying things like that?" Sarah asked, amused, and wanting to mess with Chuck.

"The most unpredictable collision is life itself," Chuck quoted. "Life will collide with you when it wants, how it wants, and all we can do is deal with what is thrown at us the best we can."

"Like when I hit you with my car?" Sarah asked.

"I'm really glad…" Chuck trailed off, catching sight of a commotion outside of the gym. The door opened, and Jeff ran in, a look of terror on his face. "What did you do?"

"I followed them," Jeff said, glancing over his shoulder. "And now, he's following me!"

"Who?" Chuck asked. The door opened, and a man ran in, a crazed look in his eye, followed by a woman. Chuck turned slowly.

The man raised a gun in Chuck's direction. "You can either move, or I'll kill you and then kill him." Chuck put a hand out to stop Sarah from reacting.

"Everyone just chill out, we have bigger issues," Chuck began.

"Frost?" Grissom said.

"Chuck?" Mary said.

"Volkoff!" Jeff screamed.

"You just had to tempt the universe, didn't you?" Sarah muttered under her breath.

}o{

"You know him?" Volkoff said, glancing at Grissom. "You know both of them?" He asked, looking at Chuck.

"It's a long story," Mary began.

"I'm her son, that she left. There, shortened it for you," Chuck said, catching Grissom's eyes. Grissom nodded just where Chuck could see.

"YOU WILL NOT DISRESPECT HER!" Volkoff screamed, jabbing the gun in Chuck's direction. Two things happened simultaneously. Grissom grabbed the heavy metal clipboard he used and swung it at Volkoff's head. Sarah kicked out, kicking the gun out of Volkoff's hand. Volkoff crashed to the floor. Sarah turned toward Mary in a fighting stance, and Mary whipped her gun toward Sarah.

"I know you've been out of my life for a while, but would you please not shoot my fiancé?" Chuck pleaded.

"Your fiancé?" Mary asked, looking over at Chuck. Sarah's foot lashed out again, kicking the gun out of Mary's hand.

"Sarah, knock it off!" Grissom yelled. "We can trust her. Help me bind this Volkoff character. Chuck, will you see about Jeff?"

Chuck turned around and saw Jeff on the floor, passed out in fear. Chuck looked up at the ceiling.

}o{

Grissom and Mary were talking at the front desk when the crew came in, frustration on their faces.

"Grissom, have you seen that idiot, Barnes?" Casey growled. "Something happened out there, Volkoff saw him, and bolted."

"He's in the back," Grissom said. "Along with Volkoff, who Sarah has tied up and is watching."

"WHAT!?" Casey yelled. Zondra's jaw had dropped.

"Are you deaf?" Grissom asked. "Sarah and I took out Volkoff, Mary here is telling me what happened to her all those years ago, and we're waiting on you and Stephen to do whatever it is you are going to do to him."

"Mary?" Casey asked, eyeing the woman. "Mary Bartowski?"

Mary appraised Casey and while Casey may have been much taller and broader, he shrank back a little under her eye.

"Where's Molly?" Casey asked, gulping.

"Carina has her," Grissom replied.

"Who's Molly?" Mary asked.

"Chuck and Sarah's daughter," Casey said, heading toward the back. He missed the jaw drop of Mary.

}o{

Carina came in a little while later, carrying Molly. Molly saw Mary, studied her, and reached for her. "Dada," she said.

"I'm sorry, little one, I'm not your dad," Mary replied. Casey went to the room where Chuck and Sarah were watching Volkoff, knowing these two needed to see this. The two walked out in time to see the scowl on Molly's face.

"Frost Queen, meet the immovable object," Chuck muttered. Sarah snorted.

"Da da," Molly said. Chuck and Sarah glanced at each other, shock on their face. They had never heard Molly use that tone before. Molly held out her hands and Mary looked at Grissom, confused.

"Trust me, it's just easier," Grissom said, shaking his head. Mary turned back, and reached out her arms. Molly came over with a smile. "Kid's undefeated," Grissom muttered.

"Dada," Molly cooed, and laid her head on Mary's shoulder. Mary just blinked.

"Did Molly just collide with Mary?" Sarah asked Chuck softly.

"I think," Chuck replied, a grin on his face. "I think."

}o{

A little bit later, Stephen came in, holding a pair of sunglasses, but stopped short seeing Mary hold Molly. "You've got to be kidding me," Stephen muttered.

"Dada," Molly said, reaching for Stephen. Mary looked at Stephen in shock and then at Molly. She shrugged, and handed Molly to Stephen. Molly glanced at the gap between the two adults, turned to Stephen, pointed at Mary and said, "Dada!" Stephen's eyes went wide, and he took a tentative glance at Mary. Mary wore the same look on her face as Stephen.

"Oh for crying out loud," Chuck said, chuckling and turning into Sarah's shoulder.

"No one can stop this kid," Sarah said softly. When Chuck turned back around, Mary and Stephen were standing beside each other. Molly sat up on Stephen's arm, looking very proud of herself.

"LET ME OUT!" came the roar from the other room.

"DADA!" Molly said pressing herself against Stephen, worry on her face.

Grissom moved quickly, taking the glasses from Stephen's hand, and grabbing his clip board. He stormed into the room Volkoff was being held in.

"Do you know who I am?!" Volkoff hissed.

"The buttmunch that's upsetting Molly," Grissom retorted, and swung the clipboard, catching Volkoff upside his head, making it hard for him to focus. As Volkoff swayed, Grissom dropped the clipboard and shoved the glasses onto Volkoff's head. His head jerked for a few second and fell forward.

"That's one way to do it," Casey muttered, leaning against the wall, watching it all happen. "Hey Bartowski, does Grimes's book have anything to say about colliding with Molly?"

"I'm going to talk to the author," Chuck replied, coming into the room. "It seems that the lesson learned is it's all gonna work out fine."

"Dada," Molly cooed, Mary stroking Molly's hair and Molly's head on Stephen's shoulder.

"Solid copy," Casey said, grinning.

}o{

Chuck was holding Molly, watching Volkoff. He had been unconscious for a bit, recovery from the Intersect removal taking some time.

"You can't fix them, you know," Chuck said softly to her.

Molly turned to him, took his face in his hands and softly said, "Dada."

"Look, kid, I know you know more than 'dada.'" Molly grinned at him. "I know what you're trying to do, but they have to figure this out. Just like your mom and I had to figure it out."

"Kiss mama?" Molly asked.

"Oh, I intend on kissing your mama for the rest of my life," Chuck told her, tickling Molly's belly. Molly shrieked and clung tighter to Chuck.

"That's a beautiful little girl," came the voice from the chair. The accent was a decidedly refined British.

Molly and Chuck both turned to look at Volkoff. "What do you think kiddo?"

"Dada," she said, with a nod.

"You sure?" Molly nodded again.

"Dad, Mom, you might want to come in here."

}o{

Two weeks later found Chuck over in the daycare part of the gym. The Volkoff personality had been removed, Jeff's Intersect had been removed. And Mary and Stephen… they were talking. Chuck knew his parents hadn't been the most affectionate people growing up, but his dad's version of flirting was… well, like watching a train wreck.

Jeff's mind had not reverted, as Chuck had feared due to the Intersect being removed. Stephen wasn't sure how Jeff had accepted the Intersect in his brain to start with. But after seeing video of Jeff pre-Intersect, Stephen thought that perhaps the Intersect had tried to fry Jeff's brain, but finding it already fried, then fixed it. Ellie said that was ludicrous, but at the same time, had no other theories.

Casey and Zondra remained stationed in Burbank to watch over Jeff, Stephen, and Mary. Mary was not allowed back into CIA fieldwork and when offered a desk job, Chuck's ears were scalded by her response. Stephen needed to be guarded, and both Chuck and Sarah had pointed out how Casey and Zondra would be perfect in that role, since they were already read in.

Carina was leading several aerobics classes, and was working as a personal trainer. She especially loved it when guys tried to get her to be their trainer. She took an almost evil glee in working them so hard that they were throwing up by the end of the day. Chuck was sure Grissom would be mad, but he just laughed, saying it served them right.

Chuck had been avoiding adults, except for Sarah, as much as possible. They were driving him crazy over wedding preparations. Morgan wanted a big church wedding. Casey thought that certain flowers should be used. Carina wanted a live band. Stephen and Mary wanted to give them something to borrow. And Sarah just wanted something small. When she asked Chuck where they should do it, he just shrugged, and joked, "Why not the Buy More parking lot? That's where it all started."

Molly was pushing a car around on the ground, and ran it into Chuck's foot. "Okay, Missy," Sarah said, seeming to come out of nowhere and snatch her up. She pulled her to her chest, making the little girl squeal in delight. "I'm about tired of you trying to steal my man."

"Don't see no ring on this finger," Chuck said with a grin. His grin fell off at the look in Sarah's eyes.

"Come on," she said, grabbing his hand, dragging him out of the daycare to the other side of the gym. "Go in there and put on the clothes waiting for you." Chuck started to argue, but decided discretion was the better part of valor, given the tone of her voice. He raised his eyebrows when he saw his old Nerd Herd outfit, but he knew right now was not the time to say anything. He came back out, and his mouth dropped. He didn't know when Sarah had time for a wardrobe change, but there she was in the Weinerlicious outfit, and it did not smell like the Weinerlicious.

"What exactly is going on?" Chuck asked.

"I'm fixing a problem," Sarah told him, handing him their daughter. "Come on, to the car."

Chuck followed, putting Molly in her car seat, and then climbing in up front.

"Any clue at all about what's going on?" Chuck asked.

"Do you remember a certain conversation we had, in a different car, the first time we met?" Sarah asked.

"I do, regardless of the concussion you gave me," Chuck replied.

"You liked it," she retorted automatically. "I have a better job now, my little girl rides with me all the time, but I still don't have a husband."

"Any prospects?" Chuck asked with a grin.

"One, but I've learned that with him, it's just better to act, than talk. He likes to talk, but I'm a girl of action."

"I bet he approves of all your actions."

"You do now you got the girl, right, nerd?"

"You do know you got the nerd, right, Sarah?" Chuck countered.

"I do," Sarah said. "And I think it's time, Chuck."

"Time for what?"

Sarah just grinned and pulled into the Buy More parking lot. Chuck saw a section of the parking lot had been roped off. He glanced at her, and saw the smile on her face. He didn't know if he had ever seen her more happy, anxious, and worried all at the same time.

"I do," he said.

"You do what?" she asked, glancing at him.

"Just practicing," he said. "I wouldn't want to blow my line."

She parked the car and turned to him. "Chuck Bartowski, if there is one thing I have learned on this journey with you, you are prepared. And you never, ever blow your line."

Chuck grinned at her, and cleared his throat. "The last collision, the act of joining two lives into one, not just physically, but symbolically, by joining lives, by joining happiness and sorrows, is the by far the one we fail at the most. Many can be married, but many do not know how to stay married. Honesty is the key. Trust is the key. The final collision is not a collision, but a joining of two imperfect parts into one perfect whole."

"For the love of God, there is a child in the back seat," she said, breathless. "Chuck."

"Sarah Walker, will you collide with me one last time?"

"Not only will I collide with you, but then there is going to be some serious joining, a lot of times."

"Oh boy!" Chuck replied.

}o{

Morgan officiated in his Ass Man outfit. Zondra, Carina, and Ellie were Sarah's bridesmaids. Emma was the Matron of Honor. Casey gave Sarah away, Devon stood there with Chuck, Mary and Stephen looking on, and Grissom stood off to the side, crying. It wasn't your typical wedding, but it hadn't been your typical meet, your typical romance, or your typical family. But it was theirs, and no one could take it from them.

}o{

"I've been thinking," Sarah said to Chuck a few weeks later. The two had come back from their honeymoon a few days early, both having missed Molly. "As much as I love that little girl, I think we could use one of our own."

Chuck sat up in bed and looked at her. "You mean, us have a child? You and me together?"

Sarah bounced a shoulder, grinning. "I mean, we already can raise one, I just don't think it's fair we haven't gotten the fun part of making one."

"Wait, do you do it differently to have one?"

"Chuck," Sarah said, exasperation and humor on her face.

"I know, I know." He sat there as a slow grin covered his face. "So… wanna have a collision?"

"You are such a nerd," she said, pulling him to her.

"You love it," he replied.

"I love you."

"I love you, Sarah."

A/N: And that my friends is the end, for now. Who knows, we may come back some day. Thank you all for reading, reviewing, PMing, and just being awesome. See you soon in another fic!