During the following Doc turns to face the camera as if he is talking to the audience.
Doc: ...and there are 2 of you here.
Doc runs down the street, Marty follows.
Doc: The other me, is the Dr Emmett Brown from 1955, the younger me...
Doc turns around and runs back to the camera.
Doc: ...that helps the younger you get back to 1985! Remember the lightning bolt at the clocktower?
Marty: Yeah.
Doc: That event doesn't happen until tonight, so you must be very careful not to run into your other self. Let me give you some money.
Doc pulls out a case, and opens it. Inside are various money bills from different times. He finds a note from 1955 and gives it to Marty.
Doc: Have to be prepared for all monetary possibilities! Get yourself some 50's clothes.
Marty: Check Doc.
Marty leaves, then Doc calls after him.
Doc: Something inconspicuous!
Cut to Mason Street, Hill Valley. Marty is in view, wearing a leather coat, glasses and a hat - not very inconspicuous at all!
Marty: (w.t) Doc, come in Doc, this is Marty, over.
Doc: (v.o) Roger Marty, this is Doc. Are you there?
Marty looks through the binoculars. He's looking at a house, filled with garden ornaments and a sign - No Trespassers - Violators Will Be Prosecuted. This Means You! We stay on this view as:
Marty: (w.t, v.o) Yeah Doc, I'm at the address.
Marty looks at the front door.
Marty: (w.t, v.o) It's the only Tannen in the book...
Cut to Marty.
Marty: (w.t) ...but I don't think it's Biff's house. It looks like some old lady lives here.
Then to prove Marty wrong, BIFF leaves the house. But to prove Marty right as well, the voice of GRANDMA TANNEN can be heard. The following is viewed through the binoculars.
Grandma Tannen: (v.o) Biff!
Biff: Yeah?
Grandma Tannen: (v.o) Where're you going Biff?
Biff: I'm going to get my car Grandma!
Grandma Tannen: (v.o) When are you coming back? My feet hurt and I want you to rub my toes some more.
Biff: Shut up you old bag.
Cut to normal view. Biff walks a few yards down the street when a red ball lands at his feet. He picks it and 5 KIDS come along to him.
Kids: Give us our ball back!
Biff: What ball?
Kids: That ball!
Biff: What ball are you talking about?
Kids: Give us our ball back!
Biff: Oh, is this your ball?
Kids: Yeah!
Marty crouches behind a car to avoid being seen. Cut back to Biff.
Biff: Is this your ball, you want it back?
Kids: Yeah!
He throws it into a gutter on a house.
Biff: Well go get it! Ha, ha, ha, ha, ha.
Biff walks off. Cut to Marty.
Marty: (w.t) Doc, it is Biff's house, I'm on him. Over.
Music: Mr Sandman by Four Acres
Biff walks down a street in Courthouse Square. Marty follows, hiding behind cars. He is not seen by Biff. Biff walks between some kids throwing a ball around.
Kid: Hey!
Biff walks over to his car, where TERRY the mechanic has fixed it. It's the same Terry from 2015 who asked Marty to thumb $100 - of course here he's 60 years younger.
Biff: Looking good Terry.