Ooh, I'm on a Distinct Planet Called Earth!

Summary
(Continuing Ep.4) Agent W breaks out of the trap and goes for Doofenshimrtz. He presses a button and the cage opens. Perry jumps out and punches Doofenshimrtz. Then he hits the Reverse Switch on the evil contraption and it blows up. Meanwhile, Phineas and Ferb are obeying Doofenshirmtz and then the day becomes brighter and everyone turns back to normal.