Elenco - O Grande Impostor
Tony Curtis
Ferdinand Waldo Demara Jr. / Martin Donner / Dr. Gilbert / Ben. W. Stone / Dr. Joseph Mornay / Robert Boyd Hammnd
Karl Malden
Father Devlin
Edmond O'Brien
Capt. Glover - HMCS Cayuga
Arthur O'Connell
Warden J.B. Chandler
Gary Merrill
Pa Demara
Joan Blackman
Lt. Catherine Lacey
Raymond Massey
Abbott Donner
Robert Middleton
R.C. Brown
Jeanette Nolan
Ma Demara
Sue Ane Langdon
Eulalie Chandler
Larry Gates
Cardinal
Mike Kellin
Clifford Thompson
Frank Gorshin
Barney
Cindi Wood
WAC Lieutenant
Dick Sargent
Hotchkiss (as Richard Sargeant)
Robert Crawford Jr.
Fred Demara Jr. (as Robert Crawford)
Doodles Weaver
Farmer Hauling Fertilizer
Ward Ramsey
Lieutenant Commander Howard - HMCS Cayuga
David White
Dr. Hammond
Philip Ahn
Capt. Hun Kim
Herbert Rudley
Senior Officer
Jerry Paris
Defense Lieutenant
Harry Carey, Jr.
Dr. Joseph Mornay
Willard Sage
Lt. Thornton
Russ Conway
Sgt. Wilkerson (uncredited)James Dobson
Sailor (uncredited)
Richard Gaines
State Official (uncredited)
Bob Herron
Highway Patrol Officer (uncredited)
Herbert Lytton
Reporter (uncredited)
Frank Maxwell
Tirdell (uncredited)Michael Ford
Soldier (uncredited)Dan Sheridan
RCN Chief (uncredited)