Hammer House of Horror (1980)

S1E13 The Mark of Satan

Title: The Devil's Embrace Plot: Edwyn Rord, a young morgue attendant, accidentally jabs himself with a needle while handling the remains of a man who believed he was under demonic influence. This incident leads Edwyn to believe he has been selected by the Devil himself as a new follower—though it may all be a figment of his imagination. Consumed by an obsession with numerology, Edwyn spirals into madness, culminating in the tragic murder of his own mother. Meanwhile, the local Vicar confronts the situation with unwavering conviction, determined to address the darkness enveloping the community.