Near a small English village, a scientific team is conducting experiments with magnetic fields, the results of which may have military applications but the intensification of which seem to be connected to UFO reports, a series of murders, an enormous insect egg, and a strange visitor with exceptional scientific knowledge.
Gil Graham
Michele Dupont
Smith
Dr. Laird
Brigadier Cartwright
Jimmy Murray
Mrs. Tucker
Insp. Burns
Helen Forsyth
Gerard Wilson
Jane Hale
Gillian Betts
Mrs. Hale