Obsession

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

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)