A man claiming to have been infected and possessed by the devil dies trying to drill a hole into his head. Hospital morgue assistant Edwyn Rord attends to the body but soon becomes obsessed with the number 9 and that the the forces of evil are at work. Has Edwyn been infected too ? [full story] Edwyn Rord Peter McEnery Stella Georgina Hale Well know in the UK for her role in the 70's TV series Budgie Dr. Harris Emrys James Markham Peter Birrel Priest Anthony Brown Dr. Manders Conrad Phillips Mrs Rord Annie Dyson Surgeon Peter Cartwright Sampson James Duggan Steve Andrew Bradford Pritchard James Curran Policeman Chrispin Gillbard   Production information for The Mark of Satan Script Don Shaw Director Don Leaver     6th December 1980 (UK ITV) Edwyn at work The hymn numbers Edwyn and Stella put his mother in the freezer The evil group taunt Edwyn The vicar to the rescue The vicar forces thr group away Edwyn on the operating table Edwyn attempts a bit of DIY surgery The church is Holy Cross Church in Greenford, Middlesex UB6 (Thanks to Rachael Marsh for informing me) The hospital was Hillingdon Hospital (Thanks to Jim, a visitor to the site for informing me) Edwyns house is in Heathfield Road, Acton (Thanks to Julian Manhood, a visitor to the site for informing me) Do you know which building was used for the library ?