Snapped: Killer Couples (2013)

S3E5 Phineas' Birthday Clip-o-Rama!

On Phineas' birthday, Ferb decides to create a montage featuring the gang's most cherished memories together. At the same time, Agent P is on a mission to thwart Dr. Doofenshmirtz, who is determined to use his latest 'non-inator' to prevent his brother's biography from airing on TV.