Behind it's forbidden doors an evil secret hides!
4.7
91 min
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.
| Name | Character | Team | |
|---|---|---|---|
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Frankie Avalon | Chris | Unowned |
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Jill Haworth | Sheila | Unowned |
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Dennis Price | Inspector Bill Bradley | Unowned |
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Mark Wynter | Gary Scott | Unowned |
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George Sewell | Bob Kellett | Unowned |
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Gina Warwick | Sylvia Fuller | Unowned |
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Richard O'Sullivan | Peter | Unowned |
| Carol Dilworth | Dorothy Pulman | Unowned | |
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Julian Barnes | Richard | Unowned |
| Veronica Doran | Madge | Unowned | |
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Robin Stewart | Henry | Unowned |
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Jan Holden | Peggy | Unowned |
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Clifford Earl | Sgt Pelley | Unowned |
| Robert Raglan | John Bradley | Unowned | |
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Vicki Michelle | Sally (uncredited) | Unowned |
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Nicholas Young | Party Guest (uncredited) | Unowned |