Doc: Reach!
Engineer: Is this a holdup?
Doc: It's a science experiment!

Jennifer Parker: Dr. Brown, I brought this note back from the future and now it's erased.
Doc: Of course it's erased.
Jennifer Parker: But what does that mean?
Doc: It means 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 you.
Marty McFly: We will, Doc.

Clara was one in a million. One in a billion. One in a googolplex!

Doc

Doc: Marty, I gave you explicit instructions not to come here but to go directly back to 1985.
Marty McFly: I know, Doc.
Doc: But it's good to see you, Marty.

We shall proceed as planned, and as soon as we return to 1985, we shall destroy this infernal machine. Traveling through time has become much too painful.

Doc

Marty, you can't go losing your judgment every time someone calls you a name. It's exactly what causes you to get into that accident in the future.

Doc

Marty, we all have to make decisions that affect the course of our lives. You've got to do what you've got to do. And I've got to do what I've got to do.

Doc

Buford "Mad Dog" Tannen: Then let's settle it, right now!
Buford's Gang Member #1: Uh, not now, Buford. Marshal's got our guns.
Buford "Mad Dog" Tannen: Like I said, we'll finish this tomorrow.
Buford's Gang Member #2: Tomorrow, we're robbing the Pine City Stage.
Buford "Mad Dog" Tannen: What about Monday? Are we doing anything Monday?
Buford's Gang Member #1: Uh, no, Monday would be fine. You can kill him on Monday.
Buford "Mad Dog" Tannen: I'll be back this way on Monday! We'll settle this then... right there... out in the street... in front of the Palace Saloon!
Marty McFly: Yeah, like when? High noon?
Buford "Mad Dog" Tannen: Noon? I do my killin' before breakfast! Seven o'clock!
Marty McFly: Eight o'clock. I do my killing after breakfast!

Marty McFly: Hey, Doc! Where you going now? Back to the future?
Doc: Nope. Already been there.

Young Doc: No wonder this circuit failed. It says "Made in Japan".
Marty McFly: What do you mean, Doc? All the best stuff is made in Japan.
Young Doc: Unbelievable.

Marty McFly: You're Mad Dog Tannen!
Buford "Mad Dog" Tannen: Mad Dog? I hate that name. I hate it. You hear? 'Cause nobody calls me "Mad Dog", especially not some duded-up, egg-sucking gutter trash.

Bartender: In about ten minutes, he's gonna be as sober as a priest on Sunday.
Marty McFly: Ten minutes? Why do we have to cut these things so damn close?

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