Psychomania

Arrogant rich boy Tom Latham (Nicky Henson) lives comfortably in a peaceful small village and is the leader of an anti-social motorcycle gang called ‘The Living Dead.’ Tom is bored and thinks he can get some kicks by committing suicide and returning to life. Tom’s devil worshipping, estate living, mod, widowed mother (Beryl Reid) — dad committed suicide 18 years ago, but never returned because he was evidently not a true believer — and her sinister cult leader butler Shadwell (George Sanders), help Tom make a pact with the devil through their frog-worshipping cult. Tom willingly goes over a bridge on his motorcyle in the belief that he’ll return from the dead as an immortal biker, that is, if he truly believes he’ll return from the dead. —Ozu’s World of Movie Reviews

Wouldn’t you know it, Tom though buried with his bike and a frog amulet kicks up the dirt and returns as an invulnerable serial killer monster. As a result of Tom’s reincarnation, the rest of the gang also drinks the Kool-Aid and commit suicide and return from the dead as the now zombie Living Dead gang. Only Tom’s girlfriend Abby (Mary Larkin) refuses to follow suit, which pisses off her undead gang. The gang lives it up riding through town and bugging pedestrians and turning over grocery store shelves and going on a killing spree. The many murders draws the attention of Chief Inspector Hesseltine (Robert Hardy) to investigate. In the end, Tom’s occultist mom gets pissed at Tom for bringing along his crude biker gang into her high-brow cultish thing and dispenses with all of them by breaking the spell that allowed them to be zombies.