Dean Stockwell as Judd Steiner

Bradford Dillman as Arthur A. Straus

Orson Welles as Jonathan Wilk

E.G. Marshall as District Attorney Harold Horn

Diane Varsi as Ruth Evans

Martin Milner as Sid Brooks

Richard Anderson as Max Steiner

Robert F. Simon as Police Lt. Johnson

Robert Burton as Charles Straus

Wilton Graff as Mr. Steiner

Louise Lorimer as Mrs. Straus aka 'Mumsy'

Gavin MacLeod as Padua - Horn's Assistant

Edward Binns as Tom Daly

Colin Kenny as Courtroom Spectator (uncredited)

Raoul Freeman as Courtroom Spectator (uncredited)

Herschel Graham as Courtroom Spectator (uncredited)