- HD 1080
- Runtime: 80m.
- Status: Released
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- Languages: en
- Country: United Kingdom
- Director: Freddie Francis
- Stars: Janette Scott, Oliver Reed, Sheila Burrell, Maurice Denham, Alexander Davion
- keywords: suicide attempt, aunt, psychological thriller, impostor
- Production_studio: Hammer Film Productions, The Rank Organisation
- Slogan: Shocking! Horrifying! Macabre!
- The Paranoiac is featured in the top rankings of 1963
- #15 in Top Thriller Movies of 1963
- #6 in Top Horror Movies of 1963
A psychotic man schemes to drive his sister mad so that he can claim her inheritance, but a deadly game of cat-and-mouse begins when an imposter intervenes.
