Casts
Peter Cushing
as Dr. Brian Stanley
Edward Judd
as Dr. David West
Carole Gray
as Toni Merrill
Eddie Byrne
as Dr. Reginald Landers
Sam Kydd
as Constable John Harris
Niall MacGinnis
as Mr. Roger Campbell
Margaret Lacey
as Old Woman
Shay Gorman
as Morton
Roger Heathcott
as Dunley
