- Country: UK
- Genres: Comedy, Drama, Thriller
- Release: 1967-09-29
- Director: Peter Collinson
- Writers: Scott Forbes , Peter Collinson
- Language: English
- Stars: Terence Morgan , Suzy Kendall , Tony Beckley , Norman Rodway , Martine Beswick
- Runtime: 96 min
- Awards: N/A
- AKA: Med kniven på struben (Denmark) , Un attico sopra l'inferno (Italy) , The Penthouse (United States of America) , To retire ton kolasmenon (Greece) , El atico (Spain) , The Penthouse (United Kingdom) , El penthouse (Argentina) , Das Penthouse , 密室 (Japan) , El penthouse (Mexico) , Takvåningen (Sweden) , The Penthouse , La nuit des alligators (France, French Republic) , Mittarinlukija (Finland) , O Apartamento dos Sádicos (Brazil)
- Plot: Three thugs--Tom, Dick and Harry (a woman)--break into the penthouse apartment of an adulterous couple and proceed to terrorize them, but as it turns out, things aren't exactly what they seem to be.
- IMDB:tt0062112
The Penthouse Cast · · · ALL
Peter Collinson
Director
Suzy Kendall
Barbara Willason
Terence Morgan
Bruce Victor
Tony Beckley
Tom
Martine Beswick
Harry
Norman Rodway
Dick