After waking from his nap Marty decides to leave a sleeping Evangeline in the room and visit the good ol' 27th floor on his own just to feel things out before bringing her up to the penthouse. He takes a deep breath as his hand hovers uncomfortably over the penthouse's door handle. "Please don't let him be there" he whispered the thought under his breath.
The instant his hand turns the doorknob shots ring out followed by muffled yelling and glass breaking. "Oh, fuck me." Marty whispers rolling his eyes as he slowly opens the door and pokes his head in to see Tannen in a tacky bathrobe, as per usual, with gun in hand and a boy in a red tee shirt on the floor getting up to run.
The boy runs up the stairs towards him and he sees ... it's him. It's Marty, it's not just someone who looks like him but it's him in every single way. Shocked by the out of body experience of seeing himself running up the stairs towards himself; Marty in the black tee slowly backs up from the door till his back hits the elevator on the other side of the hallway. He hears the gun shots and the screams echo in his head as though they were far away and a feeling like getting punched in the chest hits him hard at the sight of himself looking right back at him with an equally stupefied expression on his face. "Shit" they both whisper at the same time.
The elevator door dings and Biff's henchmen appear as the door opens. "Run!" Marty in red yells grabbing Marty's arm and running towards the emergency staircase. "Where are we going and who the hell are you!?" Marty pulls himself away from this imposter Marty in red as they stand in a maze of a staircase by the roof door. "Let's at least get away from Biff and his goons first" imposter Marty says pointing out the henchmen coming their way. Marty in black agrees and they both run to the roof.
"Alright what's going on here!?" Marty in black yells over the sound of the wind and the far away police sirens. "We're 28 floors up so you'd better talk before the cement breaks your fall, freak"
This imposter Marty in a red tee puts his hands up as if under arrest. "Look it's a long story and Biff will probably check the roof soon so..."
"Right" Marty in black runs over to a little tool shed and pulls the door open. They both get inside and shut the door. "We're safe here" he turns the lock on the door and shows it's secure. "They've never found me here before and as long as we whisper they won't be able to hear us over the sounds of the streets and the wind. So explain yourself"
Marty in red sighs and looks down at the ground searching for words. "Um, look ... I'm going to tell you something that's going to sound a bit ridiculous but hear me out."
Marty in black crosses his hands and smirks "Yeah, well I'm looking at a clone of myself so I think we're past a little ridiculous"
"Alright" Marty in the red tee begins "So...I'm you and you're me but something's happened and it's all my fault. I... I've been traveling through time.."
"So you're me from the future? Or are you me from the past? But we look about the same age. But I've always looked younger than everyone else my age so in 5 years time I'll probably still look like a damn 12 year old..." Marty in black is cut off.
"Yeah well let me finish" time-traveling Marty sighs again "Wow, this is hard to explain. Um, we're both from 1985 but I'm from an alternate dimension. Jesus, this is crazy...it all sounds so much stranger when you say it out loud. I went to the past or well I did but this split in reality happened when I went to the future and some future information got into the hands of Biff from the past; 1955 to be exact. With me so far?"
"Sure, you left future information in the hands of a teenage Biff and ruined everything" Marty is looking a little upset with himself.
"Yeah well, my Biff ... the one I've always known..." Marty in red continues to explain "He used to beat up on my dad all the time when they went to school together but in 1985 they were almost friends... well ..yeah...almost. But it was nothing like this. How do you think he made so much money gambling; luck? No, he had the information from the future. That how he's always known who was going to win."
"And you gave it to him?" you can see an anger growing in Marty in black's eyes.
"No, I.." the Marty in red tries to choose his words carefully. "I bought a sports almanac in 2015 with the intention of going back to 1985 and using it for myself but instead Biff from 2015 stole our time machine and gave the book to his younger self. I should have never bought that damn book."
"Nice going, Einstein" Marty looks down and begins to play with the frayed end of his black tee shirt. "So, in your world my dad's not dead?" Marty looks up at the Marty in red his eyes growing dark.
"I'm just getting used to the idea myself." Marty in red holds back tears. "I'm sorry I did this. It's my fault but if we get our hands on the almanac and get back to the time machine we can go back to the past and fix this"
"Perfect. Sounds like a plan" Marty in the black tee looks around the tool closet and starts searching through the boxes.
"What are you doing?" red tee Marty whispers
"I'm looking for a weapon, you dunce. Find something to defend yourself with. Oh, I found mine" black tee Marty smiles as he picks up a shovel. He slowly turns the doorknob and sees Biff with his back turned and his gun in hand. Marty slowly walks up behind Biff with the shovel poised to strike, "Hey Biff!"
Biff turns with his gun ready to shoot but Marty swings the shovel and knocks the gun out of his hand and on to the ground. Biff gets on his knees and holds his bleeding hand "You almost broke my fingers off you son of a bi..." Biff is interrupted by the sound of his own gun clicking in Marty's hand.
Marty smiles; his eyes going dark. "You've ruined my whole life and now I'm going to ruin yours." He points the gun straight at Biff's head with his right hand while he holds on to the shovel with his left.
Biff still on his knees slowly puts his bloodied hands in the air. "Relax, kid. Think about what you're doing here. I own the police. They'll do anything I say and they could put you away for a long time"
"You can't say anything if you're dead." Marty points the gun to Biff's head again and Biff backs away from Marty until he's against the wall.
Biff chuckles a little like people do when they remember something. "You want to know how your father died, Marty?"
"Shut up!" Marty yells dropping the shovel on the ground and holding the gun with both hands.
"It was kind of like this. Except I was where you're standing and you're where I was standing. I was even using that same gun." Biff grins "I suppose it's poetic justice."
Enraged by Biff's confession Marty drops the gun and picks up the shovel again hitting Biff in the head and knocking him unconscious.
"Alright lets go!" Marty in red runs out from behind the tool shed and signals Marty in black to follow but he's not listening. Instead he hits an unconscious Biff with the shovel again. "Come on! What the hell are you doing?! He's out for the count. Let's go" Marty in red grabs Marty's hand but he pulls away.
"He fucking killed him!" Marty wipes the tears on his black sleeve "Biff killed my dad with this fucking gun." Marty picks up the gun and points it at the unconscious Biff.
"Come on. You're me. I know me and I wouldn't kill anyone." Marty in red walks up to Marty and stretches out his hand "Give me the gun, Marty... I never thought I'd be talking to myself like this"
"You're not me!" Marty in black with gun still in hand turns around to face himself. I was 4 when my dad died. You weren't raised by a man who hated you and a gin soaked mother too inebriated to understand the beatings she got; the beatings I got. I'm going to end this now."
"We can end it if we find the ... the almanac" Marty in red sees the book poking out of the pocket of Biff's robe and runs to grab it. "See, we have it now. Now we can go back to 1955 and stop any of this from ever happening."
"Oh, wait, Jennifer" -"Oh, wait, Evangeline" they both spoke at once.
"Who the hell is Jennifer?"- "Who the hell's Evangeline?" they speak in unison again
"My girlfriend" they both say in unison.
"Ok, I'm tired of this echo." Marty in black cuts in "I don't know who Jennifer is but Eve's downstairs right now probably wondering where the hell I've gone so we're going to go find her and then we'll be see about fixing all this time travel nonsense.