The Wild Wild West (1965)

S3E6 The Night of the Samurai

As the U.S. State Department prepares to return a priceless samurai sword to its rightful heir, a Japanese prince, a band of sword-wielding thieves intervenes and steals it. Jim and Artemus are tasked with tracking down the stolen sword and ensuring it is returned to the prince before his departure the following afternoon. Failure to do so could jeopardize diplomatic relations between the United States and Japan.