SpongeBob SquarePants S02 E07 Mermaid Man & Barnacle Boy III

"Be there and be square!"

Mermaid Man and Barnacle Boy decide to go on vacation, but unfortunately they don't have anyone to look after the Merma-lair, so they ask SpongeBob and Patrick to look after it. However, they accidentally release Man Ray from a prison made of frozen tartar sauce.