"In a small English village everyone suddenly falls unconscious. When they awake every woman of child bearing age is pregnant. The resulting children have the same strange blond hair, eyes and a strong connection to each other."
George Sanders
as Gordon Zellaby
Barbara Shelley
as Anthea Zellaby
Martin Stephens
as David Zellaby
Michael Gwynn
as Alan Bernard
Laurence Naismith
as Dr. Willers
Richard Warner
as Harrington
Jenny Laird
as Mrs. Harrington
Sarah Long
as Evelyn Harrington
Thomas Heathcote
as James Pawle
Charlotte Mitchell
as Janet Pawle
Pamela Buck
as Milly Hughes
Rosamund Greenwood
as Miss Ogle
Susan Richards
as Mrs. Plumpton
Bernard Archard
as Vicar
Peter Vaughan
as P.C. Gobby
John Phillips
as General Leighton
Richard Vernon
as Edgar Hargraves
John Stuart
as Professor Smith
Keith Pyott
as Dr. Carlisle
Alexander Archdale
as Coroner
Sheila Robins
as Nurse
Tom Bowman
as Pilot
Anthony Harrison
as Lieutenant
Diane Aubrey
as WRAC Secretary
Gerald Paris
as Sapper
June Cowell
as Child
Linda Bateson
John Kelly
Carla Cura
Lesley Scoble
Mark Mileham
Roger Malik
Elizabeth Munden
Teri Scoble
Peter Preidel
Peter Taylor
Howard Knight
Brian Smith
as Village Child
Janice Howley
Paul Norman
Robert Marks
John Bush
Billy Lawrence
Denis Gilmore
as Keith older brother (uncredited)
John Wyndham
Novel
Ron Goodwin
Original Music Composer
Gordon Hales
Editor
Stirling Silliphant
Screenplay
Ronald Kinnoch
Wolf Rilla
Director
Producer
Geoffrey Faithfull
Director of Photography
Ivan King
Art Direction
Joan Johnstone
Hairstylist
Denis Johnson
Production Manager
Tom Howard
Visual Effects
Eric Aylott
Makeup Artist
Michael Stevenson
Third Assistant Director