The Unknown Purple
1923, English. Directed by Roland West.
Gripping! Thrilling! Unusual!
Inventor Peter Marchmont has discovered a purple light that renders the user invisible. On his release from prison, Marchmont, disguised as Victor Cromport, uses the light to revenge himself against his former wife, Jewel, and her partner, James Dawson, who framed him for theft. Making himself invisible, Marchmont gradually ruins Dawson. He so wins Jewel's confidence and love that she is willing to kill Dawson at Marchmont's request. Finally, Marchmont leaves the scheming couple to their own misery and marries Jewel's sister, Ruth Marsh.
- Runtime
- 1h 10m
- Post-credits
- None listed
- Language
- English
- Rated
- NR
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Where to watch The Unknown Purple
The Unknown Purple isn’t streaming on any OTT platform in India yet; it released on 1 October 1923.
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Cast & crew
- Roland WestDirector
- Henry B. WalthallPeter Marchmont / Victor Cromport
- Alice LakeJewel Marchmont
- Stuart HolmesJames Dawson
- Helen FergusonRuth Marsh
- Frankie LeeBobbie
- Ethel Grey TerryMrs. Freddie Goodlittle
- James MorrisonLeslie Bradbury
- Johnny ArthurFreddie Goodlittle
- Richard WayneGeorge Allison
- Brinsley ShawHawkins
- Mike DonlinBurton
- Dorothy PhillipsCast
Details
- Released
- 1 October 1923
- Country
- United States of America
Check ratings elsewhere
News & fan talk
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The Unknown Purple: quick answers
Is The Unknown Purple worth watching?
The Unknown Purple doesn’t have enough ratings for a verdict yet.
How long is The Unknown Purple?
The Unknown Purple runs 70 minutes (1h 10m).
Does The Unknown Purple have a post-credits scene?
None is listed for The Unknown Purple. Viewers tag these on TMDB, so a brand-new film may not be tagged yet.
The Unknown Purple parents guide: is it suitable for kids?
The Unknown Purple is rated NR in India. Check the rating guidance before watching with young children.
Which OTT platform is The Unknown Purple on?
The Unknown Purple isn’t streaming on any OTT platform in India yet; it released on 1 October 1923. (Checked 10 November 2026.)
What movies are like The Unknown Purple?
If you liked The Unknown Purple, try Frequencies, Doctor Who: Dark Water / Death in Heaven, Marjorie Prime.
Who directed The Unknown Purple?
The Unknown Purple (1923) was directed by Roland West and stars Henry B. Walthall, Alice Lake, Stuart Holmes.