The Lost One
- Cast: Peter Lorre, Karl John, Helmuth Rudolph, Johanna Hofer, Renate Mannhardt
- Duration: 98 minutes
- Genre: Drama, Thriller, Crime
- Rating: 6.8/10
- Release Date: 1951-09-07
A German scientist murders his fiancée during World War II when he learns that she has been selling the results of his secret research to the enemy.
