Richard Widmark

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

Paul Douglas

Capt. Tom Warren

Barbara Bel Geddes

Nancy Reed

Jack Palance

Blackie

Zero Mostel

Raymond Fitch

Dan Riss

Neff - Newspaper Reporter

Tommy Cook

Vince Poldi - Younger Brother

Wilson Bourg Jr.

Charlie - Sailor (uncredited)

Beverly C. Brown

Dr. Mackey - Board of Health (uncredited)

Lewis Charles

Kochak - Murder Victim (uncredited)

Herman Cottman

Officer Scott - Police Lab (uncredited)

John David

Fruit Salesman (uncredited)