Phineas and Ferb revive a caveman from a glacier, but the caveman gets loose into a costume party Candace is attending, and she mistakes him for Jeremy. Meanwhile, Dr. Doofenshmirtz plans to destroy all people dressed as sandwiches. --- After Buford loses his goldfish, Phineas and Ferb help him search for it. An accidental good deed causes Dr. Doofenshmirtz endless trouble.