5. 10 Rillington Place (1971)
John Christie is perhaps second to Jack the Ripper as London’s most infamous serial killer, an unassuming postman who, in the 1940s and ‘50s, strangled at least eight women, including his wife, and hid their corpses in the walls of his Notting Hill flat. Richard Fleischer’s account of his killing spree is an under-seen gem of the true crime genre, featuring a truly chilling lead performance from Richard Attenborough, which the actor claimed haunted him for a long while afterward.