In its heyday – Emma Peel era, shot on film, in colour, with the Laurie Johnson theme music – The Avengers became famous, notorious even, for its plots taking place in a nearly depopulated world. All very necessary, the better to maintain the suspension of disbelief – the outrageous storylines and

  The tone is light and bantery, a set of the features that would become permanent eventually, but in other respects this tenth episode of series two is one of the weaker entrants so far in the Avengers canon. Nothing wrong with any individual bit of it – a plot about