The Past: Jake ran through the streets of Hill Valley as it began to rain. Regular rain was no problem for a temporal scanner that was designed to stand up to acid rain so Jake followed the signal directing him to his Sarah's location. Jake was now more confident in his future than ever after having vowed that he would live his life and whatever would happen to him would happen. He continued running down the streets until finally he spotted his target. Sarah was walking down the road angrily with her 21st Century clothing and sunglasses.

"Hey kid," said Jake. "How's it going?"

"Didn't we already have this conversation?" Sarah growled.

"No," said Jake grinning. "You weren't talking to me then."

This only deepened Sarah's scowl.

"Okay then," said Jake shrugging. "So where're you going?"

Sarah stopped and glared at Jake. "Will you just get it done with so I can kill you and go on with my mission?"

"Won't that violate the space time continuum? After all, without me how would you get access to a time machine and wind up here wanting to kill me?" Jake asked.

"You're not that Jake Whitacre," Sarah growled. Jake shook his head.

"So now I'm not this person you've been claiming I am for the past few days? And here I was accepting that I was him," Jake goaded her. Sarah quickly flung her fist at him, but Jake was fully prepared for it and caught it in his hand.

"Don't do that again," he said simply before pushing her outstretched arm causing Sarah to fall backwards. Sarah quickly rolled up onto her feet again and growled at Jake.

"If you're in my way then you're propagating the continuation of this deviation along the space time continuum and you must be stopped," said Sarah angrily.

"Finally a straight up fight, that's something that never changes in any time frame. Let's go," said Jake egging her on. Jake just stood there as Sarah tackled him to the ground and clamped both hands around his neck.

"You can't do it kid, you're better than this," said Jake gagging.

"For a man from a war torn world you don't put up much of a fight," said Sarah grinning darkly.

"That would be true," Jake wheezed. "If I had truly intended on fighting you that is."

Jake yanked out the syringe and clamped his mouth down on the protective seal, ripping it off. Sarah watched in horror as Jake slammed it down onto her vein on her arm and she fell over in pain. Jake rubbed his neck as Sarah lay there writhing in agony for a few moments before sitting up again.

"Ow," she said holding her head. "Shit!"

Jake stood up from the ground as if unfazed by the previous sequence of events.

"You ready to go home?" he asked holding his hand out to her. Sarah took it before noticing the red marks on his neck.

"Oh my God I almost killed you!" she exclaimed. Jake laughed.

"No you didn't," he said chuckling walking off to the Lamborghinis, which were conveniently nearby since Sarah had just wandered around following Biff but not actually going very far since he was traveling all over town. For whatever reason, she hadn't thought to use the Lamborghini to hunt him down, but her single mindedness must have eliminated that option for her. They reached the cars in piece where Jake intended on making sure that he took off in his car this time.

"I'm just so sorry," said Sarah becoming depressed. "If I'd killed you, the timeline would've been altered forever. And perhaps more importantly, I've found that both you and the Jake Whitacre I know have become my good friends over time and I'd hate for either of your deaths to be on my hands."

Jake smiled. "It's nice to know you consider me a friend since I think the same as well. But honestly, you couldn't kill me. I'm from the 29th Century and I can live for upwards of 1,000 years or more. Don't you think that we'd have made advancements in genetic engineering in regards to our strength as well?"

With that, Jake grabbed both hands on the bumper of the car and hoisted the front part of the car into the air without breaking a sweat as if he was lifting a piece of paper.

"Wow," said Sarah in shock. Jake lowered the car and leaned against it.

"You could've chocked me all you wanted but the truth of the matter was that you would never be able to close the genetically engineered muscles around my windpipe enough to cut off my air flow. And if you did by some unbelievable amount of force, it would be simple for me to pry your hands off of my neck," said Jake.

"But all those times I hit you and you fell," Sarah protested wanting to be remorseful for what she'd done.

"Knee-jerk reaction along with the fact that if you had hit my jaw, all of the fingers in your hand would've been broken after you were done and I would still be standing unfazed," said Jake. "I learned to hone that skill after a couple natives of Salem Massachusetts accused me of being a witch and they swung at me only for me to not move and they broke their hands. They used it to accuse me of being a witch so they hanged me and buried me. Thanks to my genetic engineering, I survived the plunge and clawed my way out of the grave a few days later and left of my own accord. Strangely enough, as I was leaving I could've sworn seeing Marty and Doc Brown and his family there, although I didn't realize it until now. Oh well let's go back to the future."

"I just hope Marty's okay," said Sarah getting into her car.

"Well we could go back to the exact moment in time that we left, but let's set go three days ahead since that's how long we've been gone," said Jake. Sarah nodded and the two cars leapt into the air and into the future.

The Future: "I don't really care boss," said Jake in his boss's office. "Go ahead and erase me from time, but after what I've been through, I'm definitely not working here any longer. Besides, by the time you get around to it the world will have ended and it won't really matter than will it?"

"The Big Five will not stand for this!" shouted the boss. Jake laughed.

"Oh come off your high horse, the Big Five would only care if I vowed to erase them from history which I quite frankly have no interest in doing. For now I'm going to live in this time frame and just see what happens," said Jake. He then threw his holographic badge on the table and left the room to where Marty and Sarah were waiting for him.

"How'd it go?" Sarah asked. They'd arrived back in the future and went straight to Jake's office where Jake had promptly been chewed out for illegal use of a time machine, but Jake hid the thing so they couldn't exactly prove he'd built his own or anything like that, despite Chalmers claims to the contrary.

"As well as can be expected," said Jake shrugging. "I'm tired of being this person all of you claim I am so I'm just going to wipe the slate clean and see if I become this person you claim I will be, or if I become someone else entirely."

"I guess that's all that can be expected of you," said Sarah. "I'll miss you though, even if I still believe you will become the Jake Whitacre I know, you two aren't the same person."

"Don't worry," Jake assured her. "I'll stop by and visit some time, you're time periods have always fascinated me and I look forward to having you give me a guided tour."

"I look forward to it," said Sarah. Marty remained silent and reflective, he hadn't spoken since they'd first seen him again.

"So Marty, how were things while we were gone?" Jake asked walking off down a hallway. Marty silently fingered his new pendant.

"Insightful," he said finally. "I met some interesting people during this 'routine trip through time' and it led me to realize certain things about me and my relationship with Jennifer."

"Is that your gift to her?" Sarah asked looking at the locket. Marty nodded.

"Yes, yes it is," Marty responded, not divulging any more information than that. Sarah shrugged as they reached their 2015 Lamborghini parked in a garage full of a various other assortment of other time vehicles, including the V-8 Ford Falcon and a variety of other random vehicles including of all things a Pinto.

"Bye you guys, it's been fun," said Jake. "At least I got to apprehend my final assignment, even if Chalmers got to take the credit."

"So what's going to happen to them?" Sarah asked.

"Well Sera's already been taken to another time frame and the Kara and Tom are right now in cryogenic containment pending their trial," said Jake.

"It just seems so cruel," said Sarah. Jake shrugged.

"What's done is done," said Jake. "Besides, in a few days it won't matter anymore."

"You still think the world's going to end?" Marty asked.

"Yes," said Jake nodding. "Yes I do. See you in the future."

"You mean the past," said Marty with a grin and a distant look in his eye.

"Exactly," said Jake leaving. The Lamborghini roared off into the air and vanished into the past.

Hill Valley, 1985: Sarah and Marty sat on his porch sipping lemonade on his porch before Sarah went back to her future.

"Remind me never to respond to any of your requests in the future," said Sarah chuckling.

"Remind me never to ask you for help either," said Marty laughing.

"You could still intercept that letter and not let it reach me. Granted that would cause one hell of a paradox, but it'd be less confusing than the series of events we just went through," said Sarah laughing. A shadow fell over both of them as they both looked up to see Jennifer Parker standing in their light.

"Hello Marty," Jennifer said angrily. "Who is this? Some new girlfriend you never told me about? Has your trip through time really affected our relationship that greatly?"

Marty looked at Sarah bewildered before both began laughing.

"What?" Jennifer demanded.

"Mrs. McFly," said Sarah wiping a tear from her eye. "I don't like dating fifty year old married men."

"Mrs Mc-fifty year old men?" Jennifer asked bewildered. "…what's going on here?"

Sarah stood up and faced Jennifer.

"I'm Sarah Malone from 2015. I met Marty through a time traveling adventure not to long ago. Marty promised me a tour of his time period and I figured now would be a good time," said Sarah chuckling. Jennifer felt extremely embarrassed and realized how she'd let her emotions get away from her and it was all for nothing.

"Well it's a pleasure to meet you Ms. Malone and I'm sorry, it's just that time travel really gets me on edge sometime," said Jennifer.

"I know the feeling," said Sarah cracking her knuckles. "Anyway, happy anniversary and if you'll excuse me, I've got to be off."

With that Sarah left the two alone as she entered into Marty's garage and roared off in the Lamborghini only to be followed by three sonic booms.

"So Marty, happy anniversary," said Jennifer. Marty nodded.

"I wanted you to have this," said Jennifer handing him the box she'd gotten earlier. Marty opened the box to reveal a Mattel hoverboard inside.

"Where'd you get this?" Marty asked shocked.

"You're not the only one with time traveling friends," said Jennifer cryptically. "Just be sure not to ride it during the day. So, what'd you get me?"

Marty pulled out the locket with chain and handed it to her.

"It's beautiful," said Jennifer looking at it before she put it on and looked almost exactly like her future reincarnation. "It's old, where did you get it?"

"A friend," said Marty just as cryptically. Jennifer yanked on both ends of the locket before finally prying the rusted thing open.

"Oh Marty, you even weathered the photos of us to match the age of the locket," said Jennifer smiling.

"What?" Marty asked bewildered. He looked at the locket to reveal a photo of him and Jennifer on both sides of it. Marty then looked skyward.

"It isn't possible," thought Marty, but in his heart he knew it was true, the woman he'd met in the future was his descendant somehow.

"Listen Jennifer, I need to talk to you about our future…" Marty began.

The Future: The Lamborghini touched down in front of Sarah's family's mansion so Sarah could get some rest. She entered into the house and lounged down on one of their plush recliner seats.

"Oh good you're home," said her father who came in. "Listen I was wondering if you could postpone your trip to San Francisco in a few weeks if it was at all possible."

"Why?" Sarah asked confused.

"Well we just got a call and your big sister Aeryl is coming home for college and we'd like to be together for Thanksgiving if you don't mind," said her dad. Sarah looked at him confused.

"I don't have a big sister," she said. Her father shook his head.

"Not this game again, yes you do," he said. "Oh, this came in the mail today."

Her dad handed her a letter, which had no send by address or a stamp. Sarah opened it to reveal a short letter inside.

Dear Sarah,

Figured you'd be worried about Sera's well being so I put her some place where you could keep an eye on her. Think big sister. Ha. Ha.

Later,

Jake W.

P.S. Don't go temporal psychotic on me for this.

Sarah leaned back in her chair as she mulled this over, wondering what it would be like to have a big sister for once. Finally she groaned and got off of her chair and get back in the Lamborghini and roared off to Jake's house. Upon arriving at the long garage that was Jake's, she opened the door and peered in.

"Jake?" she asked. The place was empty save for several cars resting there. Sarah sat down dejected when a door opened.

"Hi kid, how were things while I was gone?" asked a graying Jake Whitacre appearing. "Did you enjoy your trip through time? And don't give me a look like you didn't because I know you did."

Sarah just smiled. "I'm just glad you're still around, uncle."

"What?" Jake asked smiling. "No schtick about me being a temporal investigator? You know I ran into your buddy back in 1955, that's how he got the antidote."

Sarah shrugged. "No. I don't care if you're him or not. I don't want him to be you if he doesn't want to be just like I don't want you to be him if you don't want to be."

"Good," said Jake. "Now you'll have to clean up my garage for the next three weeks for stealing my time machine and potentially causing irreparable damage to the space-time continuum."

"What?" Sarah demanded.

"Don't make me tell your parents," said Jake shaking his head. "Now go get some sleep, I expect you back here bright and early."

"You know I won't be here," said Sarah shaking her head. "I have a big sister coming home soon and I have to prepare for her arrival."

Jake grumbled something. "Just go."

Sarah shrugged and left as Jake reached into his coat pocket and revealed a weathered temporal scanner and a used bottle of hair graying solution.

"I did find out old man," said Jake nodding. "I did indeed."

The Future: Five days after Sarah and Marty left the Earth was destroyed in a wave of thermonuclear destruction. Everyone died save one individual in a time traveling Lamborhgini.