Twisted Nerve (DVD)

Cleaver. Cleaver. Chop. Chop. First the mom and then the pop. Then we'll get the pretty girl. We'll get her right between the curl. Martin Durnley (Hywel Bennett), who has a childish alter ego "Georgie", lives with his mother Enid (Phyllis Calvert) and a nouveau riche stepfather (Frank Finlay) he resents intensely. Enid dotes on Martin, largely because her first son Pete is a "mongol", and she is afraid that Martin may inherit a similar affliction. One day whilst shopping Martin encounters Susan Harper (Hayley Mills), an attractive student currently working as a librarian. Adopting the guise of retarded Georgie, Martin befriends Susan and an innocent friendship is initiated. However friendship soon turns to obsession and Martin embarks on a killing spree with Susan as his ultimate target.