Will Hay as Dr. Benjamin Twist

Edgar Kennedy as Bugs Leary

David Burns as Tony Ricardo

Edmon Ryan as Ace Marco

Fred Duprez as Cyrus Schultz

Paddy Reynolds as Mrs. Schultz

Tommy Bupp as Bertie Schultz

Arthur Goullet as Henry 'Gloves' Johnson

Gibb McLaughlin as Ship's Steward

Charlie Hall as Leary's pal

Eddie Pola as Broadcast Announcer

Cathleen Cordell as Susan

Roddy McDowall as Boy