Terrific news! Of all the one shot wonders of Doctor Who, I imagine up near the top on the fondness scale are the Zygons, who’s sole appearance was in Terror of the Zygons (1975). I don’t know if it’s because they appeared in an early Tom Baker arc–perhaps the peak moment of popularity in the old Who–or because, let’s admit it, they used the Loch Ness Monster as a pet.
Anyway, to my massive delight, the Zygons are apparently due to return in the upcoming Doctor Who 50th anniversary special coming later this year.
Oddly, Terror of the Zygons STILL hasn’t been released on DVD here, the only Tom Baker adventure of which this is true. Rumors last year had it due for a release this spring, but no firm confirmation I’ve seen of a 2013 release. Booo!