Codename: Kids Next Door Season 1 Episode 11

In "Operation: P.I.A.N.O. (Pesky Instrument Advances New Operative)", the Kids Next Door attempt to stop a shipment of pianos - otherwise known as kid torture devices. Numbuh 4 is injured when he goes against orders during the mission and is stunned to find out that his temporary replacement is a hamster! In "Operation: Z.O.O. (Zoologically Obsessed Octogenarian)", the owner of a zoo where the attractions are kids instead of animals captures the Kids Next Door.