The Unknown Purple

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.

Director: Roland West

Cast: Henry B. Walthall, Alice Lake, Stuart Holmes, Helen Ferguson, Frankie Lee, Ethel Grey Terry, James Morrison, Johnny Arthur

Audience-only score — full critic data not yet in the ReelXO vault.