Gene Hackman

Character: Reverend Scott

Ernest Borgnine

Character: Mike Rogo

Red Buttons

Character: James Martin

Carol Lynley

Character: Nonnie Parry

Roddy McDowall

Character: Acres

Stella Stevens

Character: Linda Rogo

Shelley Winters

Character: Belle Rosen

Jack Albertson

Character: Manny Rosen

Leslie Nielsen

Character: Captain Harrison

Pamela Sue Martin

Character: Susan Shelby

Eric Shea

Character: Robin Shelby

Fred Sadoff

Character: Mr. Linarcos

Roseann Williams

Character: Woman

Arthur O'Connell

Character: John, the Chaplain

Sheila Allen

Character: Nurse

Jan Arvan

Character: Doctor

Byron Webster

Character: Purser

John Crawford

Character: Chief Engineer

Bob Hastings

Character: M. C.

Erik L. Nelson

Character: Mr. Tinkham

Charles Bateman

Character: First Officer Larsen

Ruth Foster

Character: Passenger

Maurice Marsac

Character: French Naval Officer

Ernie F. Orsatti

Character: Terry

Paul Stader

Character: Martin

Marco López

Character: Passenger (uncredited)