Disclaimer: I do not own Back to the Future.

January 18, 1986
12:00 PM PST

Seventeen-year-old Marty McFly was resting on his bed with his twin, Calvin. Calvin was his interdimensional counterpart from the Biffhorrific reality. It has been nearly two months ago since the Biffhorrific versions of Doc and Marty made their home in this universe. Marty and Calvin have grown to be so fond of each other.

"This is very nice, Marty," remarked Calvin. "It's nice to finally have a real family. It is sometimes hard for me, though, to remember that my new name is Calvin. I tend to still be afraid of Biff, even though he's basically harmless in this universe."

"Well, the Biff from your world did try to shoot me," Marty pointed out. "Still, it's not really the same Biff that exists in this world. I suppose having a sports almanac can pretty well corrupt just about anyone. I hate to think I would have been as bad."

Before Calvin could reply, the telephone beside Marty's bed began to ring. As there was nobody else home, Marty decided to take the call. He wondered who it was.

"Yo," Marty replied, as he picked the receiver. He wondered if it might be one of his buddies from their rock band, The Pinheads. He had just written a new song.

"Are you Marty or Calvin?" asked a familiar voice. "If neither of you have any plans for right now, I was wondering if the two of you could come over. I need you two to run a little errand for me. I hope it's okay with you. I'm not meaning to impose."

"Sure, Doc," Marty replied. "Calvin and I will be over right away. There's nobody else home right now, and Jennifer is at Lone Pine Mall with some of her friends."

"Great," Doc replied, cheerfully. "I guess I will be seeing you in about ten minutes or so. Chris isn't feeling very good right now, and Tabitha took a trip to Sacramento."

"See you later, Doc," Marty replied, as he hung up the telephone. Turning to Calvin, he said, "I wonder what Doc needs us for, and I wonder what's wrong with Chris. At any rate, do you think the errand might involve time travel in any way?"

"I'm not sure," Calvin replied. "I would like to go on another time travel adventure, though. I didn't really get to spend too much time in 1955, after all."

"Well, let's get going," Marty urged. He wasn't sure if he was really in the mood for taking a trip through time. His last time travel experiences have been so stressful.

Marty and Calvin went to grab their skateboards, as they prepared to head over to the home of their friend. Marty wished to car-surf, but he knew that Calvin was too apprehensive about doing something too dangerous. He felt rather nervous.

oooooooooo

"It's so nice that that the two of you have made it," Doc commented, as Marty and Calvin had reached the house. "Would the two of you like to have some brownies? Tabitha had baked some a few hours ago, before she left for Sacramento."

"Oh, that would be great," Marty replied, as Calvin nodded. "I'm guessing that she went to visit her interdimensional counterpart, Sabrina. Is that right, Doc?"

"Precisely," Doc replied, as he began to place some brownies in a napkin. "Sabrina feels that it is rather interesting to have an interdimensional counterpart. She even knows about the time machine, now. I'll have to invite her to visit pretty soon."

"What about Chris?" Calvin asked, worriedly. "You mentioned that he wasn't feeling very well today? What's wrong with him? I hope it's nothing I need to worry about."

"Oh, no, not at all," Doc replied, smiling. "He just has the flu. With a little medical attention, he should be fine, soon. He needs to rest for a little while. That's all."

"So what did you need Calvin and I over for, anyway?" Marty asked. "You mentioned something about an errand. Does it, by any chance, happen to involve time travel?"

"Indeed it does," Doc replied. "I have to stay here with Chris, to make sure that he's feeling okay. At any rate, I just need the two of you to head to the year 2006 to pick up some items for me. There is this store in the future called Office Max."

"Yeah, we could do that for you," Calvin said, with enthusiam. "It would be so nice to see what the future is like. I know Marty already visited the year 2015." He burst out laughing, as he added, "It feels very funny, talking about visiting years - almost as if we were talking about visiting another time. I'm still not quite used to this concept."

"Thank you so much," Doc gushed, gratefully. "I actually did manage to forge a birth certificate for Calvin, so Calvin should be able to have an ID. It is very important for you to not look up your own future. Nobody should know about their own destiny."

"Why is that important, Doc?" Marty asked, confused. "I thought you said nobody's future has been written yet. Can looking up our future actually create a paradox?"

"Theoretically, no," Doc replied, quietly. "However, it's just not good for our personal well-being. We sure cannot live our lives by what might happen to us in the future. It is vital that we not let time travel cause us to lose sight of what is most important."

"Well, you're the doc, Doc," Marty said, smiling. "Say, I am suddenly worried about something. I think this sports almanac would already be published by 2006. What if Biff was to see that, and then recognize the book from 1955? I'm just so worried."

"Just keep the DeLorean in Hill Valley Park," Doc suggested. "I should disguise the two of you up as your older selves. You would be using your thumb print, anyway. Your older selves should both be at work, so you should have no danger there."

"I am so nervous about this," Calvin said, sighing. "I wonder what I would look like by the year 2006. I guess we would be about 37 years old. It's a little freaky."

"It's an aging mask that I picked up from the future," Doc explained. "The accuracy rate is about ninty percent, so any minor flaws in that shouldn't be too noticable."

"This is heavy duty, Doc," Marty exclaimed. "This is great. I would like to think that I would still look good by 2006. Jennifer told me that she didn't think I looked so great when she saw my older self in 2015. I am really worried about aging, you know."

"Please try not to fret," Doc suggested. "Part of how you age really depends on just how good you take care of yourself. I mean, you didn't quite have a nice life in that timeline." He stood up, and added, "I'll be right back with the masking paint."

Marty and Calvin stared at each other, as they both shrugged. He wanted to believe that what Doc told him was correct, but he couldn't help being worried.

oooooooooo

"Whoa!" Marty gasped, as he looked in the mirror. "I don't look half bad at all. I just realized we could have looked at some pictures of our great-grandfather, William. It would've given us a fairly accurate portrayal of us at the age of 37 years old."

"So William looked just like us?" Calvin asked, stunned. "I didn't really get to find out too much about my own heritage, when I was in that other world. I really knew more about Biff Tannen's heritage, then I knew about my own. It was really a big shame."

"All right, boys," Doc commented, "Here is the list of items that I need. You head on over to the Office Max, pick up the items, and then return to this year right away."

"Got, it, Doc," Marty replied. "We'll drive the DeLorean over to Hill Valley Park, and then we'll head to this date twenty years later. We'll return five minutes later."

"Good!" Doc replied, as he led Marty and Calvin over to the garage. "Now, it's very important that you don't hover the DeLorean until after you go to Hill Valley Park."

Marty nodded, as he and Calvin stepped into the DeLorean. He turned on the time circuits, and he set the destination for JAN 18 2006. He just could not help but feel somewhat worried that Biff might, once again, find out about the time machine.

"Just relax, Marty," Calvin suggested. "Biff is just not the kind of person to hang out at Hill Valley Park, so he'll never find the time machine there. We'll be fine."

"I suppose you're right, Calvin," Marty replied, as he pulled out of the driveway. "It is better to just think positively. Now that I think of it, I wonder if hoverboards would be invented by the year 2006. It's only nine years before the year 2015, after all."

"Hoverboards are so awesome," Calvin commented. "I really hope people would not consider us to be too old to use them, by the time they are finally invented."

"I don't think you're ever too old to use a hoverboard," Marty quipped, as he turned to the left. He remembered what Doc had said, about not looking up his future.

The twins didn't say another word, as Marty drove to Hill Valley Park. After he was in the park, he hovered the DeLorean, until they were far above the trees. He began to accelerate the DeLorean to 88 miles per hour, until it broke the time barrier.