John Bentley

Paul Temple

Dinah Sheridan

Steve Temple

Jack Livesey

Sir Graham Forbes

Beatrice Varley

Mrs. Weston

Barbara Couper

Mrs. Morgan

Jenny Mathot

Jacqueline Giraud

Andrew Leigh

Professor Hardwick

Hugh Dempster

Oliver Ffollett

Dino Galvani

Van Draper

Ivan Samson

Major Murray

Bruce Seton

Bill Bryant

Leo de Pokorny

Dr. Steiner

Michael Brennan

Hammond

Joseph O'Conor

Inspector Crane

Shaym Bahadur

Rikki

Maclean Rogers