Underground Agent is a 1942 American drama film directed by Michael Gordon and starring Bruce Bennett, Leslie Brooks, Frank Albertson, and Julian Rivero.

[1][2] The film was released by Columbia Pictures.

[3][4][5] Two U.S. government agents (Bruce Bennett and Frank Albertson) are assigned to prevent Nazi spies involved in a eavesdropping scheme from infiltrating into a Southern California war-defense plant.

To help them in their venture, one of the agents invents an ingenious word-scrambler that eventually leads them to the German spies.