Cliff Robertson (Michael Courtland), Geneviève Bujold (Elizabeth Courtland / Sandra Portinari), John Lithgow (Robert Lasalle), Sylvia Kuumba Williams (Maid), Wanda Blackman (Amy Courtland), J. Patrick McNamara (Third Kidnapper), Stanley J. Reyes (Inspector Brie) more..., Nick Kreiger (Farber), Stocker Fontelieu (Dr. Ellman), Don Hood (Ferguson), Andrea Esterhazy (D'Annunzio), Thomas Carr (Paperboy), Tom Felleghy (Italian Businessman), Nella Simoncini Barbieri (Mrs. Portinari), John Creamer (Justice of the Peace), Regis Cordic (Newscaster), Loraine Despres (Jane), Clyde Ventura (Ticket Agent), Fain M. Cogrove (Secretary), Robert Harper (Man in Airport (uncredited))

Bernard Herrmann (Original Music Composer), Paul Schrader (Screenplay), Brian De Palma (Story), Vilmos Zsigmond (Director of Photography), Jerry Wunderlich (Set Decoration), Paul Hirsch (Editor), Dan Sable (Sound Effects Editor) more..., George Litto (Producer), Harry N. Blum (Producer), Joe Lombardi (Special Effects), Jack Senter (Art Direction), Frank Beetson (Production Manager), Robert S. Bremson (Executive Producer), Paul B. Clay (Music Editor), Hannah Scheel (Script Supervisor), Rachel Griffiths (Script Supervisor), Frank Balchus (Costume Design), Rachel Ticotin (Production Assistant), Nick McLean (First Assistant Camera), Dan Sable (Stunt Coordinator), David M. Ronne (Sound Mixer), Frank L. Brown (Set Dresser), Deborah Boldt (Assistant Editor), Bob Bender (Assistant Director), Wiliam Pool (Assistant Director), Candace Cruzd (Assistant Editor), Bob Herron (Stunt Coordinator),