Behind it's forbidden doors an evil secret hides!
July 15, 1969
1h 31m
EN
Michael Armstrong
Teenagers in an old mansion are being murdered one by one. The survivors must discover who among them is the killer before they're all finished off.
Frankie Avalon
Chris
Jill Haworth
Sheila
Dennis Price
Inspector Bill Bradley
Mark Wynter
Gary Scott
Michael Armstrong
36
George Sewell
Bob Kellett
Gina Warwick
Sylvia Fuller
Richard O'Sullivan
Peter
Carol Dilworth
Dorothy Pulman
Julian Barnes
Richard
Veronica Doran
Madge
Tigon British Film Productions
GB
American International Pictures
US
Tigon
N/A
