The Wild Wild West - Season 2 Episode 16 : The Night of the Tottering Tontine 1969

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 bylaws state that the surviving 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. They find a house full of traps and two members of the tontine looking to "survive" the group and take the money for themselves.