Currently available on 3 streaming services.

JustWatchTV
Stream Free
The Unknown

The Unknown - watch online: streaming, buy or rent

Currently you are able to watch "The Unknown" streaming on Amazon Prime Video.

Cast

Lon Chaney
Alonzo
Norman Kerry
Malabar
Joan Crawford
Nanon Zanzi
Nick De Ruiz
Antonio Zanzi
John George
Cojo
Frank Lanning
Costra
Margaret Bert
Fortune Teller (uncredited)
Louise Emmons
Gypsy Woman (uncredited)
Italia Frandi
Girl in Audience Flirting with Malabar (uncredited)
Venezia Frandi
Woman in Audience (uncredited)
Polly Moran
Landlady / Servant in Audience (uncredited)
Julian Rivero
Man in Theatre Audience (uncredited)
Billy Seay
The Little Wolf (uncredited)
Dorothy Seay
Spectator (uncredited)
John St. Polis
Surgeon (uncredited)