
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.
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More from this season

S1 E1
The Eagle's Nest
When murderous fishermen kill an agent investigating an island, Steed, Gambit, and Purdey go to investigate the man's death and the suspicious monastery there. Apparently in 1945 an airplane carrying 'Germany's Greatest Treasure' made its final stop there, and the monks turn out quite different than perhaps Steed and his crew have anticipated...

S1 E2
House of Cards
When Steed has a hoard of screaming teenagers rescue his intended victim, spymaster Perov seemingly commits suicide. But days later his system of sleeper agents, the House of Cards, activates, and Steed, Purdy & Gambit find themselves fighting trusted friends.

S1 E3
The Last of the Cybernauts ...??
When a double agent called Kane is horribly disfigured in a chase, he vows vengeance...and calls upon the powers of a force who has tangled with Steed and his associates twice before: the Cybernauts. Creations of a misguided and imbalanced scientist, Dr Armstrong, these metallic menaces in both their attempts were stopped by the suave Steed and the inimitable Mrs Peel. However, this time they are being manipulated by an even more malignant force, and Steed and his friends enter into great danger in an attempt to stop the Cybernauts one last time.

S1 E4
The Midas Touch
The terrific trio come up against Professor Turner, a scientist with a lust for gold, and his protege Midas, whose touch is deadly.