Tony Randall
— Prof. Daniel Potter
Shirley Jones
— Janice Claridge
Edward Andrews
— Griswald
Howard Morris
— Sweeney
Ernest Truex
— Claridge
Jim Backus
— Sergeant
Frank Faylen
— Catfish
Celia Milius
— Sally Brighton
Dick Sargent
— Tommy
Adam Roarke
— Bob Brighton
Whit Bissell
— Dr. Braden
Harriet E. MacGibbon
— Mrs. Claridge
Jim Boles
— Pete
Parley Baer
— Police Captain
Connie Gilchrist
— Maid
Kathleen Mulqueen
— Elderly Lady