An Unseen Enemy
- An: 1912
- Pays: United States of America
- Genre: Drame
- Studio: American Mutoscope & Biograph
- Mot-clé: race against time, menace, thief, silent film, mortal danger, safecracker, safe deposit box, peril, young sisters, sisters
- Réalisateur: D.W. Griffith
- Jeter: Lillian Gish, Dorothy Gish, Robert Harron, Elmer Booth, Grace Henderson, Harry Carey