Richard Widmark

as Lt. Cmdr. Clinton 'Clint' Reed M.D.

Paul Douglas

as Capt. Tom Warren

Barbara Bel Geddes

as Nancy Reed

Jack Palance

as Blackie

Zero Mostel

as Raymond Fitch

Dan Riss

as Neff - Newspaper Reporter

Tommy Cook

as Vince Poldi - Younger Brother

Wilson Bourg Jr.

as Charlie - Sailor (uncredited)

Beverly C. Brown

as Dr. Mackey - Board of Health (uncredited)

Lewis Charles

as Kochak - Murder Victim (uncredited)

Herman Cottman

as Officer Scott - Police Lab (uncredited)

John David

as Fruit Salesman (uncredited)

William A. Dean

as Cortelyou (uncredited)

Robert Dorsen

as Coast Guard Lieutenant (uncredited)

George Ehmig

as Kleber - Medical Examiner Technician (uncredited)

H. Waller Fowler Jr.

as Mayor Murray (uncredited)

Paul Hostetler

as Lt. Paul Gafney M.D. - Public Health Service (uncredited)

Elia Kazan

as Cleaver - Mortuary Assistant (uncredited)

Edward Kennedy

as Jordan (uncredited)

Mary Liswood

as Angie Fitch - Raymond's Wife (uncredited)

Henry Mamet

as Anson (uncredited)

Tiger Joe Marsh

as Bosun on Nile Queen (uncredited)

Ruth Moore Mathews

as Mrs. Dubin (uncredited)

Emile Meyer

as Capt. Beauclyde - Master of Nile Queen (uncredited)

Alex Minotis

as John Mefaris - Restaurant Owner (uncredited)

Rex Moad

as Wynant (uncredited)

Ray Müller

as Dubin (uncredited)

Lenka Peterson

as Jeanette - Charlie's Girlfriend (uncredited)

Waldo Pitkin

as Ben (uncredited)

Tommy Rettig

as Tommy Reed (uncredited)

Stanley J. Reyes

as Redfield (uncredited)

John Schilleci

as Lee (uncredited)

Al Theriot

as Al (uncredited)

Guy Thomajan

as Poldi - Blackie's Flunky (uncredited)

Arthur Tong

as Lascar Boy on Nile Queen (uncredited)

H.T. Tsiang

as Cook on Nile Queen (uncredited)

Irvine Vidacovich

as Johnston (uncredited)

Juan Villasana

as Hotel Proprietor (uncredited)

Pat Walshe

as Pat - Newspaper Peddler (uncredited)

Val Winter

as Commissioner Dan Quinn (uncredited)

Leo Zinser

as Sgt. Phelps (uncredited)

Aline Stevens

as Rita Mefaris (uncredited)