Brain Drain

Vincent Martella

Phineas Flynn (voice)

Thomas Brodie-Sangster

Ferb Fletcher (voice)

Ashley French

Candace Flynn (voice)

Caroline Rhea

Linda Flynn-Fletcher (voice)

Dee Bradley Baker

Perry the Platypus (voice)

Alyson Stoner

Isabella Garcia-Shapiro (voice)

Dan Povenmire

Heinz Doofenshmirtz (voice)

Bobby Gaylor

Buford Van Stomm (voice)

Jeff 'Swampy' Marsh

Francis Monogram (voice)

Maulik Pancholy

Baljeet Tjinder (voice)

Richard O'Brien

Lawrence Fletcher (voice)

Kelly Hu

Stacy Hirano (voice)

Mitchel Musso

Jeremy Johnson (voice)

Tyler Alexander Mann

Carl Karl (voice)

Logan Miller

Johnny (voice)