Someone Behind the Door, is a 1971 French crime-drama film directed by Nicolas Gessner. In the UK, it was twice retitled as Two Minds For Murder, a (theatrical title) and Brainkill, a (VHS title). It is based on a novel by Jacques Robert. The film was shot on location in Folkestone, England.br A neurosurgeon and psychiatrist manipulates an amnesiac to murder his wife's lover, believing that the patient will have no memory of what he has done, providing the surgeon with a perfect alibi.