The Zero Imperative (Mark Gatiss) BBV
The Zero Imperative (Mark Gatiss) 
01/1994 BBV UK
01/1994 BBV UK
Former UNIT luminary Liz Shaw and her assistant Louise Bayliss are investigating a series of bizarre murders, all committed near a soon-to-be-closed psychiatric hospital.
When the hospital is unexpectedly reprieved by rich industrialist Peter Russell, events seem to move out of Liz's control. Are the incumbent director of the clinic, Doctor Dove and his predecessor, Doctor O'Kane, harbouring the killer? What is the centuries-old horror hidden in the grounds?
And what exactly is the secret of room zero?
