The first series featured several episodes using science fiction themes similar to those of the classic "Emma Peel" "Avengers" era. The new trio had to deal with suspended animation ("The Eagle's Nest"), biological warfare ("The Midas Touch"), robotics ("The Last of The Cybernauts?"), mind transfer ("Three-Handed Game") and even a giant rat ("Gnaws", a title patterned after the hit movie "Jaws"). Second series episodes featured science fiction elements, such as the artificially-intelligent super-computer of "Complex", the Russian soldiers revived from suspended animation in "K is for Kill", the submersible Russian community in "Forward Base" and the superhumans of "The Gladiators". Other episodes of that season dealt with more realistic plots.