The Lost One (1951) is a Drama, Thriller, Crime film that follows 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. The Lost One is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 6.8 out of 10 from 32 votes. Fans of drama movies may also want to explore similar titles below.