[Knocking on door]
[Electronic warbling]
MARTY: Doc?
Don't say a word.
DOC: No names. I want to know nothing about you.
MARTY: Listen, Doc... DOC: Quiet!
DOC: Don't tell me anything.
MARTY: You got to help... DOC: Quiet.
[Electronic warbling]
I'm going to read your thoughts.
Let's see now. You come here from a great distance?
- Yeah. Exactly. - Don't tell me!
DOC: You want me to subscribe to the Saturday Evening Post.
- No. - Not a word now!
Quiet.
Donations.
You want me to make a donation...
...to the Coast Guard Youth Auxiliary.
Doc...
[Electronics grow silent]
...l'm from the future.
I came here in a time machine that you invented.
Now, I need your help to get back to the year 1985.
My God!
Do you know what this means?
It means that this damn thing doesn't work at all!
MARTY: You got to help me. You are the only one who knows how your time machine works.
[Whispering] Time machine?
I haven't invented any time machine.
Okay. I'll prove it to you.
Look at my driver's license. Expires 1987.
Look at my birthday. I haven't even been born yet.
And look at this picture.
It's my brother, my sister and me.
Look at her sweatshirt, Doc. "Class of 1984"?
DOC: Pretty mediocre photographic fakery. They cut off your brother's hair.
I'm telling the truth. You got to believe me.
Then tell me, future boy...
...who's president of the United States in 1985?
- Ronald Reagan. - Ronald Reagan? The actor?
[Doc exclaims]
Then who's vice president? Jerry Lewis?
DOC: I suppose Jane Wyman is the First Lady. MARTY: Wait, Doc!
DOC: And Jack Benny is treasury secretary.
MARTY: Listen to me.
I've had enough jokes for one evening. Good night, future boy!
MARTY: No, wait, Doc.
MARTY: The bruise on your head. I know how that happened. You told me.
You were standing on your toilet hanging a clock...
...and you fell and hit your head on the sink.
That's when you got the idea for the flux capacitor which...
...is what makes time travel possible.