The Wild Wild West (1965) : 3x15

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 unseen assailant.