Raymond Burr
— Robert Ironside
Geraldine Brooks
— Honor Thompson
Wally Cox
— Scoutmaster
Kim Darby
— Ellen Wells
David Sheiner
— Doctor
Lilia Skala
— Sister Agatha
Gene Lyons
— Police Commissioner Dennis Randall
Don Galloway
— Det. Sgt. Ed Brown
Barbara Anderson
— Eve Whitfield
Don Mitchell
— Mark Sanger
Joel Fabiani
— Dr. Schley
Ayllene Gibbons
— Baby Peggy Marvel
Terrence O'Flaherty
— Announcer
Eddie Firestone
— Wheels Montana
Tony Dante
— Pressman Bar
Nicholas Colasanto
— Mr. Matling (uncredited)
Antonio Fargas
— T.D. Harris (uncredited)
Bruce Garrick
— Billy Matling
Theo Marcuse
— Bartender
William O'Connell
— Curator (uncredited)
Stuart Margolin
— News Show Staff (uncredited)
Grace Lee Whitney
— Stripper (uncredited)