Mission: Impossible - Season 6 - Eps 12: Nerves
Wendell Hayes, the brother of an imprisoned Syndicate enforcer, has stolen a canister of nerve gas and threatens to use it if his brother Cayman isn't freed - the IMF must stop him and recover the gas. Worse, the canister has a defective casing that Wendell is unaware of, and will release the gas in 43 hours anyway. And...Cayman dies of a heart attack in jail, forcing the IMF to have guest-agent Bill Williams take his place. The IMF has Hayes' imprisoned girlfriend Saretta ""escape"" with prisoner-Casey handcuffed to her. Saretta takes Casey to a winery in a IMF car with a bug on it that Barney traces. Jim delivers ""Cayman"" but Hayes doesn't turn over the gas. They track Hayes to an observatory but he gets word via his partner Tully that his brother tied and he unmasks Williams-as-Cayman. Hayes and Tully shoot it out over an argument and with his dying breath Hayes tries to shoot open the canister...hid in the observatory roof, revealing its location to the IMF.
About Mission: Impossible

Title: Mission: Impossible
First Air Date: 1966-09-17
Last Air Date: 1973-03-30
Status: Ended
Rating: 7.6/10 (from 278 votes)
Language: EN
Seasons: 7
Total Episodes: 171
Network: CBS
Genres: Action & Adventure, Crime, Drama
Production Companies: Desilu Productions, Paramount Television
Synopsis
Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of secret government agents known as the Impossible Missions Force. In the first season, the team is led by Dan Briggs, played by Steven Hill; Jim Phelps, played by Peter Graves, takes charge for the remaining seasons. A hallmark of the series shows Briggs or Phelps receiving his instructions on a recording that then self-destructs, followed by the theme music composed by Lalo Schifrin. The series aired on the CBS network from September 1966 to March 1973, then returned to television for two seasons on ABC, from 1988 to 1990, retaining only Graves in the cast. It later inspired a popular series of theatrical motion pictures starring Tom Cruise, beginning in 1996.
Cast

Peter Graves
Jim Phelps

Greg Morris
Barney Collier

Peter Lupus
Willy Armitage

Lynda Day George
Dana Lambert

Bob Johnson
Man on Tape (voice)