Back to the Future | 1985

If we could somehow harness this lightning...

channel it into the flux capacitor...

it just might work.

Next Saturday night we're sending you back to the future!

All right. Saturday's good.

I can spend a week in 1955. I can hang out. You can show me around.

That is out of the question. You must not leave this house.

You must not see or talk to anybody.

Anything you do can have repercussions on future events. Do you understand?

Yeah. Sure. Okay.

Have you interacted with anybody else today besides me?

Yeah, well, I might've sort of bumped into my parents.

Great Scott! Let me see that photograph again of your brother.

Just as I thought. This proves my theory. Look at your brother.

His head's gone. It's like it's been erased.

Erased from existence.

They really cleaned this place up. Looks brand-new.

According to my theory, you interfered with your parents' first meeting.

If they don't meet, they won't fall in love, get married or have kids.

That's why your brother's disappearing.

Your sister will follow, and unless you repair the damage, you're next.

Sounds heavy.

Weight has nothing to do with it.

Which one's your pop?

That's him.

Very funny. You guys are being real mature.