2015 Biff: Oh yeah?
He turns the volume up.
Radio Announcer: (v.o) Here comes Decker with the kick, it's up, it looks good folks, it looks very good, field goal! UCLA wins 19 to 17!
As the announcer keeps talking, 1955 Biff looks at his future self in amazement.
1955 Biff: Alright pops, what's the gag?
Cut to Marty in the boot.
1955 Biff: (o.s) (continued) How did you know what the score was gonna be?
2015 Biff: (o.s) I told you, it's in this book!
Cut back to the Biffs.
2015 Biff: (continued) All you gotta do is bet on the winner, and you'll never lose.
2015 Biff hands the book to 1955 Biff.
1955 Biff: Alright, I'll take a look at it.
He throws it in the back, it lands near Marty. Marty is about to grab it when 2015 Biff grabs the book 9without seeing Marty).
2015 Biff: You damned fool!
The two get out of the car.
2015 Biff: Never, never leave this book lying around! Don't you have a safe? (realises) No, you don't have a safe. Get a safe! Keep it locked up, and until then keep it on you like this.
He puts the book in 1955 Biff's back jeans pocket.
1955 Biff: Hey, what're ya doing?
2015 Biff: And don't tell anyone about it either. Oh, and there's one more thing.
During the following , 1955 Biff closes the garage door, and the Biffs leave the garage.
2015 Biff: (continued) One day, a kid, or a crazy wild-eyed scientist who claims to be a scientist is gonna come around asking about that book.....
They walk off, continuing their conversation. Cut to Marty. He tries to open the door - but it's locked! And we see the outside padlock to prove it. Marty looks up at the windows, but they're far too small for him to climb out of.
Marty: I'm trapped!
He gets his walkie-talkie out.
Marty: (w.t) Doc, come in Doc!
Cut to Doc at the DeLorean.
Doc: Marty, what's the report?
Marty: (v.o) Biff's gone!
Cut to the garage.
Marty: (w.t) He's got the book, the old man's gone too. I'm locked in Biff's garage.
Cut to Doc.
Marty: (v.o) You've gotta fly the DeLorean over here and get me the hell out of here.
Cut to the garage.
Marty: (w.t) The address is 1809 Maple Street.
Cut back to Doc.
Doc: I can't take the DeLorean out in the daylight, but don't worry Marty, somehow I'll get over there.
Cut to the garage.
Marty: (w.t) Whoa Doc, wait a minute Doc. Hey Doc!
No answer, Marty puts away the walkie-talkie and sighs.
Marty: Perfect!
Later that evening, it's dark. Biff leaves his house.
Grandma Tannen: (v.o) Biff! Biff, where're you going now?
Biff: I told you Grandma, I'm going to the dance!
We cut to the garage, where Marty is listening.
Grandma Tannen: (v.o) When are you coming home?
Marty: The dance!
Biff: I'll get home when I get home!
Biff enters the garage. Marty hides in the back of the car.
Grandma Tannen: (v.o) Don't forget to turn off the garage lights!