Sid Caesar as Ben Powell

Vera Miles as Kate Powell

Barry Gordon as Steve Powell

John McGiver as Uncle George

Cass Daley as Felicity Twitchell

Ricky Cordell as Miles Thorpe

Mary Wickes as Gloria Tritt

Jesse White as Fess Dorple

Robert Donner as Ebenezer Twitchell

Nestor Paiva as Felicity's Father

Doodles Weaver as Booper Mellish

Jay C. Flippen as Mother

Jill Townsend as Jenny / Priscilla Weems / Carol Weems

John Astin as Dr. Frieden

Harvey Lembeck as Capt. Pederson (uncredited)

William Castle as Mr. Hymer (uncredited)

Byron Foulger as Drug Store Owner (uncredited)