The Unknown Purple isn’t ranked against other titles yet. A title needs ratings from 3 different sites and 5,000 votes. This one has 0 sites and 10 votes so far. The ratings below are everything we hold for it.
Where to watch
No streaming service listed it when we checked on 13 October 2026. It may still be available where you are.
Streaming data from JustWatch
The Unknown Purple
MEANRANK
Every rating
A brilliant but eccentric scientist is wronged and imprisoned by a powerful business rival. In prison, he discovers a miraculous process to create a unique purple light that can render objects invisible. After his release, he uses this invention to exact revenge on the men who ruined him, moving unseen through the city like a ghost to dismantle their lives and fortunes.
Details
- Director
- Roland West
- Studio
- Carlos Productions
- Released
- 1 October 1923
- Country
- United States
- Language
- English
- Runtime
- 70 min
- Rated
- NR