Orson Welles
Jonathan Wilk
Diane Varsi
Ruth Evans
Dean Stockwell
Judd Steiner
Bradford Dillman
Arthur A. Straus
E.G. Marshall
District Attorney Harold Horn
Martin Milner
Sid Brooks
Richard Anderson
Max Steiner
Robert F. Simon
Police Lt. Johnson
Robert Burton
Charles Straus
Wilton Graff
Mr. Steiner
Louise Lorimer
Mrs. Straus aka 'Mumsy'
Gavin MacLeod
Padua - Horn's Assistant
Edward Binns
Tom Daly
Colin Kenny
Courtroom Spectator (uncredited)