Little is known about the story, other than a statement made by writer Michael Feeney Callan on his website in 2009: I wrote a two-parter called The Children of January. It was to be a season closer, not a series termination. But the BBC decided in mid-season that the show had run its course and, in the middle eighties, I think they were right. But I loved my episode, which was delivered late in 1985. I created a race of runaway proto-humans called the Z'ros, sort of 'human bees', of which I still have the fondest nightmares. 'The Children of January', incidentally, refers to renegade outcasts of a dawning "parallel universe" civilisation that was abandoned.Michael Feeney Callan