Sean Connery as Duke Anderson

Dyan Cannon as Ingrid

Martin Balsam as Haskins

Ralph Meeker as Police Captain 'Iron Balls' Delaney

Alan King as Pat Angelo

Christopher Walken as The Kid

Val Avery as Parelli aka Socks

Dick Anthony Williams as Spencer

Garrett Morris as Officer Everson

Stan Gottlieb as Pop

Paul Benjamin as Jimmy

Anthony Holland as Psychologist

Richard B. Shull as Werner

Conrad Bain as Dr. Rubicoff

Margaret Hamilton as Miss Kaler

Judith Lowry as Mrs. Hathaway

Max Showalter as Bingham

Janet Ward as Mrs. Bingham

Scott Jacoby as Jerry Bingham

Norman Rose as Longene

Meg Myles as Mrs. Longene

John Call as O'Leary

Raoul Kraushaar as D'Medico

John Braden as Vanessi

Paula Trueman as Nurse

Michael Miller as First Agent

Michael Prince as Johnson

Frank Macetta as Papa Angelo

Jack Doroshow as Eric - Decorator Tenant

Michael Clary as Eric's Friend

Hildy Brooks as Receptionist

Robert Dagney as Doctor

Bradford English as T.V. Watcher

Reid Cruickshanks as Judge

Tom Signorelli as Sync Man

Carmine Caridi as Detective

Michael Fairman as Sergeant Claire

George Patelis as Detective B

William J. Daprato as Detective C

Sam Coppola as Private Detective

Mary Boylan as Bus Station Lady (uncredited)

Bruce Brown as Policeman (uncredited)

James Forster as Sergeant (uncredited)

Charles Frank as Ambulance Attendant (uncredited)

Al Kirk as Thief (uncredited)

Tom Nobles as Police Lieutenant (uncredited)