Watched Levine's animation for this one, what a fascinating episode! No doctor, no companions, just a bunch of temporary cast who all get morbidly killed, either by extermination or transformation into these disgusting creatures. No one will ever find out what happened to them or where they died and they failed to get any warning out to those on earth.

This is one of the most unique Doctor Who stories ever. The new series delivers Doctor-lite episode, but this story shows this show’s infinitely flexible nature, you can have no regular elements from the wider show and it’s still Doctor Who