Operation Diplomat

Guy Rolfe

Dr. Mark Fenton

Lisa Daniely

Lisa Durand

Patricia Dainton

Sister Rogers

Sydney Tafler

Wade

Ballard Berkeley

Inspector Austin

Anton Diffring

Edward Shroder

Brian Worth

Geoffrey Terry

Avice Landone

Mrs. Terry

Eric Berry

Col. Williams

James Raglan

Sir Oliver Peters

Alexis Chesnakov

Ship's Captain

Michael Golden

Harrison

Edward Dentith

Sergeant Lewis

Derek Aylward

William Franklyn

Dr. Gillespie

Desmond Llewelyn

Police Constable at Barrier

John Guillermin

Director, Writer

Francis Durbridge

Story

Denis Johnson

Assistant Director

A.R. Rawlinson

Writer