Gene Hackman as Reverend Scott

Ernest Borgnine as Mike Rogo

Red Buttons as James Martin

Carol Lynley as Nonnie Parry

Roddy McDowall as Acres

Stella Stevens as Linda Rogo

Shelley Winters as Belle Rosen

Jack Albertson as Manny Rosen

Leslie Nielsen as Captain Harrison

Pamela Sue Martin as Susan Shelby

Eric Shea as Robin Shelby

Fred Sadoff as Mr. Linarcos

Roseann Williams as Woman

Arthur O'Connell as John, the Chaplain

Sheila Allen as Nurse

Jan Arvan as Doctor

Byron Webster as Purser

John Crawford as Chief Engineer

Bob Hastings as M. C.

Erik L. Nelson as Mr. Tinkham

Charles Bateman as First Officer Larsen

Ruth Foster as Passenger

Maurice Marsac as French Naval Officer

Ernie F. Orsatti as Terry

Paul Stader as Martin

Marco López as Passenger (uncredited)