The Unknown Purple
|The Unknown Purple|
|Directed by||Roland West|
|Written by||Roland West|
Alfred A. Cohn (titles)
|Cinematography||Oliver T. Marsh|
|Edited by||Alfred A. Cohn|
|Distributed by||Truart Film Corporation|
|Language||Silent (English intertitles)|
After his release from prison, an inventor develops an eerie purple light that renders him invisible, enabling him to seek revenge on his unfaithful wife and his crooked business partner.
- Henry B. Walthall as Peter Marchmont 
- Alice Lake as Jewel Marchmont
- Stuart Holmes as James Dawson
- Helen Ferguson as Ruth Marsh
- Frankie Lee as Bobbie
- Dorothy Phillips as Mrs. Freddie Goodlittle
- Ethel Grey Terry as Leslie Bradbury
- James Morrison as Leslie Bradbury
- Johnny Arthur as Freddie Goodlittle
- Richard Wayne as George Allison
- Brinsley Shaw as Hawkins
- Mike Donlin as Burton
Film historian Scott MacQueen cited "The Vanishing Men", a treatment West had targeted for film in 1921, as the inspiration for the film. The film was adapted from a stage play which was written by Roland West and Carlyle Moore. Comedian Johnny Arthur made his feature-length debut in The Unknown Purple.
The Unknown Purple was released in October 1923.
In a contemporary review, Variety described the film as an "exceptionally well-made picture - among the best of its type - a mystery." The review praised the photography of Oliver Marsh and the acting by Henry Walthall and Alice Lake.
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