Perhaps because the hysterical levels of 1950s Cold War paranoia that swept America never reached the same heights here, Britain never really went for big insect movies. However, the odd ones did slip out and here Forrest Tucker is the obligatory square-jawed imported American out to stop irradiated bugs taking over the world. Cheap and cheerful fun.

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.