Macdonald Carey as Simon Wells

Shirley Anne Field as Joan

Viveca Lindfors as Freya Neilson

Alexander Knox as Bernard

Oliver Reed as King

Walter Gotell as Major Holland

James Villiers as Captain Gregory

Tom Kempinski as Ted

Kenneth Cope as Sid

Brian Oulton as Mr. Dingle

Barbara Everest as Miss Lamont

Allan McClelland as Mr. Stuart

James Maxwell as Mr. Talbot

Rachel Clay as Victoria

Caroline Sheldon as Elizabeth

Rebecca Dignam as Anne

Siobhan Taylor as Mary

Nicholas Clay as Richard (as Nicolas Clay)

Kit Williams as Henry

Christopher Witty as William

David Palmer as George

John Thompson as Charles

Fiona Duncan as Control Room Guard (uncredited)

León García as Teddy Boy (uncredited)

Victor Gorf as (uncredited)