Director:
Barry Davis Alan Clarke John Mackenzie

Casting:
Alison Steadman,
Nigel Hawthorne,
Tony Caunter,

UK, 1970

Director:
Jeannot Szwarc Jeff Corey Gene R. Kearney

Casting:
Rod Serling,
Larry Watson,
Joanna Pettet,

USA, 1969

Director:
Harvey Frost Jack Nixon-Browne Barry Cranstoun

Casting:
Douglas Campbell,
Sandy Webster,
Kay Hawtrey,

Canada, 1977

Director:
Rudi Dorn Mario Prizek Ronald Weyman

Casting:
Jayne Eastwood,
Doreen Brownstone,
John Colicos,

Canada, 1974