The New Avengers - Season 1 - Eps 7: To Catch a Rat
A strange message alerts Steed, Purdey, and Gambit to something strange going on. While Steed does his own research, Purdey and Gambit set out to help shed some light on the situation. However, the reality of the case is that due to a seventeen-year-old open case and a bout of amnesia, the legendary traitorous White Rat has at last begun to operate again. And Purdey is in imminent danger from her own romance.
About The New Avengers

Title: The New Avengers
First Air Date: 1976-10-22
Last Air Date: 1977-12-17
Status: Ended
Rating: 6.9/10 (from 41 votes)
Language: EN
Seasons: 2
Total Episodes: 26
Network: ITV1
Genres: Drama, Action & Adventure
Production Companies: Unknown
Synopsis
The New Avengers is a British secret agent fantasy adventure television series broadcast during 1976 and 1977. It is a sequel to the 1960s series The Avengers and was developed by Albert Fennell and Brian Clemens. A joint United Kingdom-France-Canada production, the show picks up the adventures of John Steed and his team of Avengers fighting evil plots and world domination. Whereas in the original series Steed had almost always been partnered with a woman, in the new series he had two partners: Mike Gambit, a top agent, crack marksman and trained martial artist, and Purdey, a former trainee with The Royal Ballet who was an amalgam of many of the best talents from Steed's previous female partners.
Cast

Patrick Macnee
John Steed

Gareth Hunt
Mike Gambit

Joanna Lumley
Purdey