The Devil of Winterborne (1995)

Doctor Liz Shaw, one-time companion of the Doctor at UNIT, is called upon to head a small team, P.R.O.B.E., to investigate strange happenings throughout the country. When she is called in to find the truth about the brutal murder of a retired headmaster she finds evidence of satanic rites near the murder scene. She soon discovers a web of deceit and corruption that extends back in time, threatening the current occupants of nearby Winterborne School. With P.R.O.B.E. under threat from within and the death toll mounting, Liz finds herself under increasing pressure from all sides to produce results… The Devil of Winterborne is at large and only Liz can stop it!
Described as a British 'X-Files', this independent spin-off of 'Doctor Who' uses characters and actors associated with the classic BBC science fiction drama.