Jonathan Wilk
Orson Welles
Judd Steiner
Dean Stockwell
Ruth Evans
Diane Varsi
Arthur A. Straus
Bradford Dillman
District Attorney Harold Horn
E.G. Marshall
Sid Brooks
Martin Milner
Max Steiner
Richard Anderson
Police Lt. Johnson
Robert Simon
Charles Straus
Robert Burton
Tom Daly
Edward Binns
Mr. Steiner
Wilton Graff
Mrs. Straus
Louise Lorimer
Padua - Horn's Assistant
Gavin MacLeod
Benson
Terry Becker
Courtroom Spectator (uncredited)
Colin Kenny
Edgar Llewellyn
Russ Bender
Emma
Gerry Lock
Detective
Harry Carter
Detective
Simon Scott
Judge
Voltaire Perkins
Medical Examiner
Jack Lomas
Albert, Steiner's Chauffeur
Peter Brocco
Globe Newspaper Editor
Alan Carney
Jonas Kessler
Wendell Holmes
Juror
Kenner G. Kemp
Mike's Girlfriend
Ina Balin
Frank Conroy
Waiter
Henry Kulky
Doctor
Dayton Lummis