Phineas and Ferb the Movie: Across the 2nd Dimension2011

Computer:
Phineas and Ferb, this message is top secret, for your ears only. If you are hearing this, the Tri-State Area is at emergency alert level alpha red. Agent P needs your help.

Phineas:
How does he know we'll know what to do?

Computer:
He knows you know what to do. He also knows you two are the only ones capable of helping him because you two are the only ones capable of creating these.

[A door opens.]

Computer:
Auto scan replication initiated.

[Suddenly machines begin to recreate inventions Phineas and Ferb have built in the past.]

Phineas:
Ferb, I think I know what we're going to do today!