Agent James West attempts to rescue a man called Mr. Markham from a masked assailant who flees the scene of the crime. As Markham lays dying, he utters two words: "enzo" and "silver." Meanwhile, Agent Artemus Gordon has joined a troupe of entertainers traveling to Denver under the leadership of casino operator Kohner. Gordon, who is posing as a Shakespearean actor, learns that a man called Enzo has a girl friend, Topaze. She is a dancer with the troupe, probably working under an assumed name, and is on her way to meet Enzo in Denver. Dierdre, a dancer,attempts to pass some information to West but a jealous Kohner interrupts them and engages the agent in a fight with him and El Bardhoom, a huge weight lifter. Later, Artemus hears a strange voice of Markham's masked Killer. When West goes to meet Dierdre at midnight, he discovers that she too been slain by anunseen assailant.
Elenco: Robert Conrad , Ross Martin , Charles Aidman , Agnes Moorehead .