(In front of Marty and Ally's house)

Afterwards, Doc drives them back to the front of their house. The siblings get out of the Delorean with their skateboards in their hands. "So how far do you plan on going?" Marty asked. Doc leaned over to look out of the passenger side window.

"About 30 years. It's a nice round number," Doc replied, smiling at them. Ally leaned in and petted Einstein between his ears. "Look us up when you get there, okay? I'll be about 45 and Marty will be 47." Ally said.

"You bet, kiddo," Doc said, shaking their hands. "Oh, and watch that re-entry. It's a bit bumpy," Marty reminded. "Indeed I will," Doc nodded. "Take care, Doc," Ally said, holding her skateboard underneath her right arm.

"You two, kids," Doc said. The teens gave Einstein another pet before Doc pulled the door shut. The siblings watch as Doc drives down the road, turns the Delorean around and speeds off down the street, disappearing in a bright flash of light along with three sonic booms.

Ally stretches her arms and says, "I don't know about you, but I'm ready for a good night's sleep," "You read my mind there. C'mon," Marty agreed. The two siblings went through the gate, and they climbed in their bedroom window. Both were out like lights before their heads hit their pillows.

(October 27, 1985)

(10:30 AM)

Marty's alarm clock goes off, playing the song Back in Time by Heuy Lewis and the News. Marty wakes up from his slumber and rubs his eyes. Ally soon wakes up after him, stretching her limbs.

"What a nightmare…" Marty said, his head feeling fuzzy. "You have that same dream too?" Ally asked through a yawn, standing up. Marty glanced at his sister, looking confused. "Uh, y-yeah," he nodded.

They felt their stomachs growl and agreed to get something to eat from the kitchen. However, when they walked in there, they didn't notice that something was different about their house.

"Wait, Marty," Ally said, quickly going back to the living room. Marty quickly followed her back to the living room. There was something different about it. The furniture looked new, nothing like in the other timeline.

They looked at one another before they heard the voices of David and Linda from the dining table. They stared at their older siblings, seeing that they looked different as well. David was in a grey suit and a black tie and a pair of loafers on. He was reading a newspaper and drinking coffee from a mug.

Linda wore a yellow shirt with a flower-patterned, fabric vest. Her hair was also in curls, which she couldn't ever accomplish. They were discussing how David wasn't Linda's answering service about her boyfriend. And she didn't wear glasses.

"Hey, what the hell is this?" Marty asked, seeing that they were eating at the table. Linda glanced up at Marty and Ally in confusion. "Breakfast," she said. David looked at their attire and commented, "What? Did you two sleep in your clothes again?"

Marty and Ally looked down and saw they were still wearing their clothes from yesterday. "Um… yeah, wh-what're you wearing, Dave?" Ally asked. David stands up from the table. "Allison, I always wear a suit to the office. You two alright there?" he responds, walking from the table.

Marty and Ally kept looking around their house, both confused. Then, they heard the voices of their parents coming from the back door. They then look to where the voices came from and were shocked by how their parents looked.

Lorraine was much thinner and George was carrying a briefcase, his hair was not greased, it was grey and parted to the side. He wore sunglasses. They were talking about a game they had tigehter.

The sight made Marty and Ally fall to the ground from shock. Lorraine and George look at them. "Mom! Dad!" Ally said. The married couple looks at their kids worriedly.

"Marty, Ally, are you two alright?" Lorraine asked. "Did you guys hit your heads?" George asked, taking off his sunglasses.

Marty and Ally stand back up. "No, you guys look great! Mom, you look so thin." Marty complimented. Lorraine smiled and looked down at her outfit for a moment.

"Why thank you, Marty." she said. George then sneaks behind her and pinches her on the bottom. She giggled and jumped a little. "George!" she laughed.

She walks over to them and kissed them on the cheeks and gives them a hug. "Oh, Ally, don't you have that singing audition tonight?" Lorraine asked. Ally was confused by what she said.

"Why, you've been doing this since you were 13, remember? You were going to perform one of the songs you wrote yourself?" Lorrain said. "Oh… right. I forgot," Ally said, pretending to know.

"Oh, Marty, I've been meaning to remind you that Jennifer Parker called," Linda reminded. Lorraine perked up and said, "Aw, I just love that girl, Marty. She's always so sweet. That reminds me, don't you have that big date tonight, Marty?"

The two siblings were confused at what their mother asked them. "Date?" Marty asked. "Yes, the big date at the lake, you were planning it for two weeks," Lorraine said, taking a drink from her coffee cup.

"Mom, how can I go to the lake when the car's wrecked?" Marty said. "Wrecked?" George said, setting his glass down and standing up. Everyone jumped up from their seats at the news.

"When the hell did this happen? And why am I always the last one to find out?" David complained. George shook his head and made his way to the front door. "Alright, calm down, I'm sure the car is fine." he said, opening the front door. Marty and Ally followed him to see what their dad was looking at.

Outside, was Biff Tannen, waxing the car hood. He was wearing a green jacket and sweatpants with a red undershirt. He seemed to be a mechanic this time. They saw that he seemed more subservient because of George punching him back in 1955.

"See, there it is, Biff's waxing it," George says, "Um, now, Biff, I want to make sure that there's more than one coat of wax," Biff glanced up at George, squinting because of the sunlight. "Just finishing up the second coat now," Biff said.

"Now, Biff, don't con me," George said, his voice stern. He wasn't falling for what Biff was telling him. Biff laughed and walked around the car. "I'm sorry, Mr. Mcfly, I was starting on the second coat," he said with a nervous laugh.

"Oh, Biff, what a character. Always trying to get away with something, but if it wasn't for him-" George started, leaving the two siblings in complete awe that Biff was so submissive.

They walked back to the dining room and listened to their parents talk. "We never would've fallen in love," Lorraine finished, sitting on the arm of the living chair with George sitting in the seat of it. Marty and Ally were happy to see that their parents' marriage was healthy and happy.

"That's right," George said, kissing her as the door opened. "Oh, Mr. McFly! Mr. McFly, this just arrived!" Biff exclaimed, carrying a box in his hands. He sees Marty and Ally and gives them a friendly wave. "I think it's your new book," Biff said, setting the box on the dining table.

George and Lorraine come over to the table as Biff opens it. "Oh, honey, your first novel," Lorraine said happily. The front cover showed a man wearing Marty's radiation suit with a teen girl and a teen guy kneeling in front of the man. The title was, 'A Match Made in Space,' "Like I always say, if you put your mind to it, you can accomplish anything," George said, looking at both sides of the book.

"Oh, Marty, here's your keys. You guys are all waxed up, ready for tonight," Biff said, handing Marty a pair of car keys. "Keys?" they both said in confusion. Why would Biff hand Marty a pair of keys?

To see what Biff was talking about, they went outside to the garage. Marty opens it up to reveal that 4X4 truck that Marty saw before. It was really here; sitting in the garage. This was the truck that Marty had his eyes on before all of this changed.

"I can't believe it, Marty," Ally said, happy for him. Marty ran his hand over the truck and smiled. "This is the one, Ally," Marty said happily.

Out of the corner of Ally's eye, she saw none other than Jennifer. She wore pink floral pants, a white shirt, and a blue denim vest. Jennifer put a finger to her lips before Ally could say anything. She walks to the entryway of the garage.

"How about a ride, mister?" she asked. Marty looked to his left and saw his girlfriend standing there. He became starry-eyed when he saw her. "Jennifer… oh aren't you a sight for sore eyes," Marty said, walking over to her, "Let me look at you,"

"Marty, you guys are acting as if you haven't seen me in a week," Jennifer said. Marty and Ally glanced at one another, and laughed a little. "Oh, if only you knew, Jen," Ally said. "Are you two okay?" Jennifer asked.

The two siblings looked towards the back door and saw their parents standing there for a moment. "Oh, everything's perfect." Marty said. Him and Jennifer were about to kiss but were interrupted by three sonic booms from the street.

They all look towards the driveway and they see the Delorean crash into one of their trash cans, causing the contents in it to spill out. They walk over with confused looks just before Doc hops out of the car.

He was wearing a long yellow jacket, a red shirt with a plastic tie, and sun visors over his eyes. "Marty, Ally!" he said, rushing over to them. He grabbed their shoulders and said, "You two gotta come back with me!"

Marty waves a hand passed Doc's visor. "Where, Doc?" Marty asked. Doc lifts his visor and looks at them with wide eyes. "Back to the future!" he said before going through a garbage can to pull out some garbage. Ally narrowed her eyebrows in confusion.

"Wait a minute, what're you doing, Doc?" Ally asked. They watched as Doc flipped open a compartment called Mr. Fusion on the back of the Delorean and puts the garbage inside it.

"Quick, get in the car, you two!" Doc said. "W-Wait, Doc, we just got back. And we were going to take the new truck for a spin," Marty said. "Well, bring her, too! This concerns her too," Doc suggested.

"Wait, Doc, what're you talking about? What happens to us in the future? Do we become assholes or something?" Marty asked. "Oh, no, no, no, you and Jennifer turn out fine. It's your kids, Marty. Something's gotta be done with your kids!" Doc corrected, shaking his head.

"Well, what about me, Doc? Don't I have any kids?" Ally asked. "Yes, Ally. You have a daughter named Piper. But unfortunately, your husband died in a car accident," Doc replied. They were shocked to hear that they have kids of their own. But it was a bummer that Ally's husband that she doesn't even know died.

The four of them got in the car and backed out of the driveway. Jennifer sat in Marty's lap while Ally sat in between them. "Hey Doc, I think you should back up," Ally said. "Yeah, we don't have any road to get up to 88," Marty added.

"Roads? Where we're going, we don't need roads," Doc said, pushing his visor over his eyes. Next thing they knew, the Delorean lifted off the ground, it's wheels tucked underneath it. Doc had fixed the Delorean to where it could fly.

Doc then flew the Delorean into the future with three sonic booms.

End of Part One. I do plan on doing the other two parts to this trilogy.

Thank you for reading