"Set A Thief To Catch A Thief" is the 1508th episode of The Lone Ranger, which aired on September 21, 1942. In this gripping episode, the Lone Ranger and Tonto face a cunning adversary as they try to solve a series of thefts in a small town. The title references the age-old adage about using a thief to catch a thief, and the plot unfolds with clever twists and turns, leading to a thrilling resolution. The story emphasizes themes of justice, cleverness, and the consequences of crime.