Snapped: Killer Couples (2013)

S3E24 Escape From Phineas Tower

When Phineas and Ferb stumble upon an old escape chamber that their dad brings home, it sparks their creativity. They set out to construct a computer-controlled tower that will confine them, giving them the chance to delve into the fascinating world of escapement. At the same time, Dr. Doofenshmirtz is busy working on his latest invention, the "Rude-Inator," aimed at sabotaging Roger's important meeting with an English dignitary.