Robert Hutton as Dr. Curtis Temple

Jennifer Jayne as Lee Mason

Bernard Kay as Richard Arlen

Zia Mohyeddin as Farge

Geoffrey Wallace as Alan Mullane

Maurice Good as Agent Stilwell

Michael Gough as Dr. Arnold Grey

Luanshya Greer as Gas Station Attendant

Paul Bacon as Dr. Rogers

James Donnelly as Guard at Farm Gate

Jack Lambert as Temple's Doctor

Edward Rees as Bank Manager

Frank Forsyth as Mr. Blake

Kenneth Kendall as TV Commentator

Norman Claridge as Dr. Frederick Andrews

Michael Hawkins as Williams

Christopher Banks as Doctor - Street

Robin Parkinson as Dr. Maitland

Leonard Grahame as McCabe

John Harvey as Bill Trethowan

Diana King as Mrs. Trethowan

Dermot Cathie as Peterson

Katy Wild as Girl in Street