The Avengers Season 3 Episode 22 The Outside-In Man

Steed and Tara are on a mission to stop a spy who is using a very unusual form of information stealing tactics. The spy is using a psychiatrist to extract secrets from his patients. The secret agent has already stolen one formula and is now attempting to steal another. The agents discover that the psychiatrist is using a new drug to extract the information. The spy has also made a breakthrough in that he now has a machine which can read the thoughts of those under the influence of the drug. The Avengers must race against time to stop the spy before he can get away with yet another secret. Steed and Tara must use all of their skills and intelligence to thwart the effort of the spy and his psychiatrist.