Guest Stars Rosie Kerslake as Kate Geoffrey Beevers as Dr. Peters Jeremy Gittins as Barman Marjorie Yates as Carol Blackburn Roger Hammond as Coroner Ian Flintoff as Detective Superintendent Cathcart Paul Haley as Phil Andrews John Breslin as James Blackburn Douglas Milvain as Brewster John Hartley as Havelock Alan Gill as TV Announcer Frank Duncan as Dr. Gregory Patricia Perry as Laboratory Assistant
