From Tigon British Film Productions, (Witchfinder General (1968) and Blood on Satan's Claw (1971)), this is a very low budget horror film directed by Vernon Sewell, who did other B-Movies like Some May Live (1967) and Curse of the Crimson Altar (1968), this is a very silly horror film but it doesn't outstay it's welcome. There's been a series of murders in a small community just outside London, coachman Joe Trigger (Leslie Anderson) has been driven to insanity by claiming he saw a creature kill one victim. So, Scotland Yard send Detective Inspector Quennell (Peter Cushing) and his assistant, Sergeant Allan (Glynn Edwards) to investigate. Their first port of call is the house of entomology professor Dr. Carl Mallinger (Robert Flemyng) as two of his students were tragic victims, but he denies knowing of any such involvement. Meanwhile, naturalist Frederick Britewell (William Wilde) has just returned from Africa with some specimens for Dr. Mallinger. Britewell falls for Mallinger's daughter Clare (Wanda Ventham), but there's something about Clare that just doesn't seem right at all. It's a quite cheap and cheesy horror film, done on a pittance and it shows, it does have it's moments, including Roy Hudd stealing the film as a morgue assistant who's always eating. It manages to be a worthwhile timepiece from when horror films weren't nasty and brutal.