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
Orangey
Cat (uncredited)