Former UNIT luminary Liz Shaw and her assistant 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 harboring the killer? What is the centuries-old horror hidden in the grounds? And what exactly is the secret of room zero?
Caroline John
Dr. Elizabeth Shaw
Jon Pertwee
Dr. Jeremiah O'Kane
Sylvester McCoy
Dr. Colin Dove
Colin Baker
Peter Russell
Mark Gatiss
Dr. William Bruffin
Louise Jameson
Patricia Haggard
Sophie Aldred
Public Relations Officer
Linda Lusardi
Louise Bayliss
