Robert Wagner

as Frank "Frankie" O'Neill

Dana Wynter

as Sue Trumbell

Jeffrey Hunter

as Sgt. Nico Kantaylis

Hope Lange

as Andrea Lenaine Kantaylis

Bradford Dillman

as Alan Newcombe

Sheree North

as Lorraine

France Nuyen

as Kalai Ducanne

Mort Sahl

as Danny Krieger

Veronica Cartwright

as Allie O'Neill

Harvey Stephens

as Amory Newcombe

Paul Comi

as Father Wallensack

Joe Di Reda

as Capistron

Buck Class

as Derek

Edith Barrett

as Mrs. Lenaine

James Bell

as Sidney Lenaine

Steven Gant

as Babe Ricarno

Brian Corcoran

as Bobby O'Neill

Murvyn Vye

as Charlie Scanlon