The Wild Wild West - Season 2 Episode 16 -

West and Gordon are assigned to protect Dr. Raven, who is developing a secret weapon. Raven is a member of a tontine, an investment group whose by-laws state that the surving member of the group gets the assets of the group. When one of the tontine's members is killed and an attempt is made on Raven's life, the agents decide to investigate.