A physician discovers that two children are being kept virtually imprisoned in their house by their father. He investigates, and discovers a web of sex, incest and satanic possession.
Robert Hardy
as Zorn
Shane Briant
as Emil
Gillian Hills
as Elizabeth
Yvonne Mitchell
as Hilda
Paul Jones
as Carl Richter
Patrick Magee
as Falkenberg
Kenneth J. Warren
as Klaus
Michael Hordern
as Priest
Robert Brown
as Fischinger
Virginia Wetherell
as Inge
Deirdre Costello
as Magda
Barry Stanton
as Ernst
