That was an excellent episode and a lovely throwback to the 70s. Can’t wait for the finale. Too bad the new seasons are so short.
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At first, I thought it was the Beast. I had the "No, it couldn't be" thought when they started removing letters. RTD sure knows how to build a grandiose cliffhanger. I haven't seen Pyramids of Mars in awhile, but it was one of the first 4th Doctor stories I watched since Moffat chose it for the Doctors Revisited specials in 2013.The short seasons are an annoyance that seems to be all too common now. I'd prefer the 13 we used to have years ago (with 3-4 two-parters). I'm even more disappointed that we can't even get 10 episodes per season. Overall, I really enjoy this season, but I do feel like it's been cut short and something has been lost as a result (even subpar episodes can build up and flesh out the Doctor, the companion, and their dynamic).