Phineas and Ferb

Season 1, Episode 18

Episode Title: It's a Mud, Mud, Mud, Mud World

Air Date: 2008-02-24

Overview:

Phineas and Ferb create a monster truck for Candace to practice driving while Dr. Doofenshmirtz tries to find investors for his line of monster trucks that are actual monsters, with a trump card to take down the competition.