Phineas and Ferb — Episode 45: Phineas and Ferb Get Busted

You are watching the episode Phineas and Ferb Get Busted After taunting the boys for going to search for the "Lake Nose Monster", Candace begins freaking out on her lifeguard job, seeing the monster at every turn. Meanwhile, Dr. Doofenshmirtz tries to remove all the zinc from the lake, though even he's not sure why.