Paul Douglas
Police Ofcr. Charlie Dunnigan

Richard Basehart
Robert Cosick

Barbara Bel Geddes
Virginia Foster

Debra Paget
Ruth

Agnes Moorehead
Christine Hill Cosick

Robert Keith
Paul E. Cosick

Howard Da Silva
Deputy Police Chief Moskar

Jeffrey Hunter
Danny Klempner

Martin Gabel
Dr. Strauss

Grace Kelly
Mrs. Louise Ann Fuller

Frank Faylen
Walter, room service waiter

Jeff Corey
Police Sgt. Farley

James Millican
Police Sgt. Boyle

Donald Randolph
Dr. Benson

Richard Beymer
(uncredited)

Ossie Davis
Cab Driver (uncredited)

Brad Dexter
Reporter (uncredited)

Leif Erickson
Bit Part (uncredited)

Sandra Gould
Hotel Switchboard Operator (uncredited)

Russell Hicks
Regan, Hotel Manager (uncredited)

Brian Keith
Extra (uncredited)

Harvey Lembeck
Cab Driver (uncredited)

John Randolph
Fireman (uncredited)

Janice Rule
Bit Part (uncredited)

Joyce Van Patten
Barbara (uncredited)

Willard Waterman
Mr. Harris (uncredited)

John Cassavetes
Reporter (uncredited)

Rusty Lane
Cop (uncredited)

Alix Talton
Miss Kelly (uncredited)