Calificación
Reparto

Simon Oates
Dr. Joe Burke

Zena Marshall
Sandy Lund

Charles Hawtrey
Joshua Yellowlees

Patricia Hayes
Mrs. Jones

Stanley Meadows
Ben Keller

Max Adrian
Dr. Henry Shore

Frank Barry
Burke (as a child)

Leonard Cracknell
Nick

André Maranne
Gendarme

Frank Forsyth
Uncle

Robert Jewell
Robot Operator

Richard Carpenter
Danny