Paramutual Pictures wants to know where all the money is going so they hire Morty to be their spy. Morty works for Mr. Sneak and gets a job in the mail room so that he can have access to the lot. But all that Morty ever finds is that he can cause havoc no matter what he does.

Jerry Lewis
as Morty S. Tashman

Brian Donlevy
as Tom 'T.P.' Paramutual

Howard McNear
as Dexter Sneak

Dick Wesson
as The A.D.

Kathleen Freeman
as Mrs. Helen Paramutual

Robert Ivers
as Young NY Director Who Argues with T.P.

Pat Dahl
as Miss Carson

Renée Taylor
as Miss Giles

Rita Hayes
as Singer Who Dubs Davitt

Stanley Adams
as Grumpy