I decided to go a bit further back and watch some more Patrick Troughton. I choose 'The Seeds of Death' an Ice Warriors 6-parter.

In Earth's future, The Ice Warriors have taken control of the moon and are using it as a spring-board to conquer earth. Mankind has abandoned conventional travel and instead uses only T-Mat to beam everywhere. Rockets and even cars are but a relic of the past forgotten in a museum. So Earth finds itself seemingly helpless to take back the moon with the T-Mat in the invader's hands.

This was a great premise for a story but it wasn't without it's logical problems. The one with the Tardis is quickly ignored, when The Doctor says that his rickety old Tardis couldn't possibly be guided accurately enough to land on the moon. So you forget that and enjoy the adventure... until episode 5. At this point the earth forces suddenly remember that they do have Rockets after all when the script requires the launching of a satellite. Also when they need to get somewhere fast they find a convenient car out of nowhere (Where they got the petrol from is never explained).

However the central performances, the atmospheric and inventive Direction, the dramatic tension thoughout, some terrific set designs and superior model work (Some of the best space footage from the classic era IMO) make these logical problems easy to forgive.

I found Terry Scully's complex character Fewsham ^ particulaly engaging as he tustles with morality.

Two 'Invasion' stories (Dinosaurs and Androids) from Pertwee and Baker T next.