I’m enjoying this one much, much more than I did the last time I watched it. The Doctor’s first confrontation with his mysterious opponent, the Shadow, is full of great dialogue, and there’s a real sense that our heroes have an absurd amount of things to do, with one genuine obstacle after another. None of it feels like padding, and after the writers’ last two stories for the show the previous year (“The Invisible Enemy” and “Underworld”), neither of which I enjoyed, this feels like they’re back on form. This was Bob Baker and Dave Martin’s last Who serial as a team, although Baker would write a solo adventure in the next season, and Dave Martin would write a few of the tie-in books in the 1980s.
In fact, the only scenes in this story that are at all long-winded are the ones where K9 communicates with the Evil Supercomputer that runs the planet Zeos. There are lots of long pauses, sped-up tape computer noises, and sound effects. It kind of gets in the way of the slapstick. Tom Baker and guest star Davyd Harries get to hide from each other in weird corridors and be silly, which delighted our son and probably kept Baker amused at a point where he was losing interest and yelling at everybody. Good thing one of the other guest stars, Lalla Ward, was around to keep him smiling.
Our son really thought these two parts were incredibly exciting, especially when Atrios’s marshal launches his attack on Zeos, which will trigger a doomsday device in retaliation, like Dr. Strangelove. He was completely thrilled by this, but incredibly aggravated by the cliffhanger revelation that the Shadow has abducted K9 and put one of his little black control boxes on him. K9 now calls the Shadow his master! He was incensed, and refused to agree that this is a good adventure at all, just because that ending had him so riled.