Interstellar2014

Cooper:
[to young Murph] Tell him Murph. Make him stay. Make... Make him stay Murph. Make him stay Murph! Don't let me leave, Murph! Don't, don't let me leave Murph! NO, NO, NO, NO!

Murph:
It was you. You were my ghost.

TARS:
Cooper... Cooper... Come in, Cooper.

Cooper:
TARS?

TARS:
Roger that.

Cooper:
You survived!

TARS:
Somewhere, in their fifth dimension, they... saved us.

Cooper:
Who the hell is they? Why would they want to help us, huh?

TARS:
I don't know, but they constructed this three-dimensional space inside of their five-dimensional reality to allow you to understand it.

Cooper:
Well, it ain't working.

TARS:
Yes it is! You've seen that time is represented here as a *physical* dimension! You've worked out that you *can* exert a force across space-time!

Cooper:
Gravity. To send a message.

TARS:
Affirmative.

Cooper:
Gravity can cross the dimensions, including time.