Two young brothers secretly bring home a seal from their summer vacation and try to hide it from Mom and Dad. Havoc ensues as Sammy's antics disrupt the quiet town of Gatesville and its unsuspecting residents.
Michael McGreeveyArthur Loomis
Bill MumyPetey Loomis
Jack CarsonHarold Sylvester
Robert CulpChester 'Chet' Loomis
Ann JillianPorsche 'Rocky' Sylvester
Patricia BarryHelen Loomis
Elisabeth FraserLovey Sylvester
Renie RianoMrs. Crotty
Mary MitchelSue Foster
Claude StroudBen
Bill BaldwinParty Guest (uncredited)Benjie BancroftParty Guest (uncredited)
Tommy FarrellParty Guest (uncredited)
Shep HoughtonParty Guest (uncredited)Joseph La CavaWaiter (uncredited)
