Doctor Who episode 687: The Greatest Show in the Galaxy – Part Four (4/1/1989)
‘It was your show all along, wasn’t it?’ This one falls apart in the final episode, but it does so quite entertainingly. McCoy’s ability to vamp for the Gods of Ragnarok is a scene that none of the other Doctors (barring, perhaps, Pertwee at his most vaudevillian) could have pulled off quite so well, and even if I don’t really follow what the Gods’ plan is, buy that the Doctor’s been battling them ‘all through time’, understand how Kingpin’s eye medallion is able to destroy them or why they keep shooting at the Doctor when it’s just bouncing back at them (the Emperor Palpatine manoeuvre), it’s all enormous fun to watch.