Phineas and Ferb are cavemen and invent something useful; Dr. Doofenshmirtz tries to remodel his place; Phineas and Ferb must rescue Princess Isabella.
Director:
Dan Povenmire
Zac Moncrief
Cast:
Vincent Martella
Thomas Sangster
Ashley Tisdale
Caroline Rhea
Richard O'Brien
Dee Baker
Dan Povenmire
Mitchel Musso
Alyson Stoner
Maulik Pancholy
Kelly Hu
Tyler Mann
Olivia Olson
Kari Wahlgren