Some scientist were being kidnapped by a cybernaut. That is a kind of robot which is very wellknown with karate and he can trace people via their heartbeat which is unic for every person. It appears this is the work of Paul Beresfort who wants let find out by the kidnapped scientists something which can make suffering Steed and Emma forever. He wants to revenche them because in his opinion they are responsible for his brothers' death. His brother invented the cybernauts. This episode is a continuation on the episode

the Cybernauts; an episode from the black and white season with Emma Peel. And so this episode will be continued in The last of the cybernauts? (New Avengers).