Doc: Jules!...
Jules is followed by his younger brother, who's about 7 or 8.
Doc: And Verne! (to his sons) Boys, this is Marty and Jennifer.
The boys wave, and Marty and Jennifer wave back.
Marty: Doc, I thought I'd never see you again!
Doc: You can't keep a good scientist down. After all, I had to come back for Einstein, and, well, I didn't want you to be worried about me.
Clara gives Doc a parcel.
Doc: Oh. I brought you a little souvenir.
Doc sits on the cab steps and gives Marty the parcel. Marty opens it and finds it's a framed photo of him and Doc at the 1885 clocktower.
Marty: It's great Doc. Thanks.
Jennifer: Doctor Brown?
Jennifer takes out the erased fax from her pocket and gives it to Doc.
Jennifer: I brought this note back from the future and...now it's erased!
Doc: Of course it's erased!
Jennifer: But what does that mean?
Doc: It means that your future hasn't been written yet. No one's has. Your future is whatever you make it. So make it a good one. Both of ya!
Marty: We will, Doc!
Doc: Stand back!
The train doors close.
Doc: All right, boys, buckle up!
Marty: Hey, Doc...where ya going now? Back to the future?
Doc shakes his head and smiles.
Doc: Nope. Already been there!
Doc and family wave at Marty and Jennifer, and they wave back. Then the train's wheels lift up - it's been hover converted! The train flies off, turns around and heads towards the camera before breaking the time barrier.
Cut to a black screen, it's.....
THE END