Terminus's dead pilot, the Doctor, and Kari in Terminus's control room. (Terminus Part Three) ©BBC |
The Doctor's plotline has more of a bearing on events in terms of threat level, as he and Kari make some interesting discoveries about Terminus -- due in part to Bor, the Vanir who went into the Forbidden Zone in part one and made some unpleasant discoveries of his own. Bor is probably the best of the all the Vanir, concerned far more with the possibility of another of Terminus's engines exploding than with anything else, including his own safety. Of course, this means that he's contracted radiation sickness from being inside the Forbidden Zone so long -- "Short-term memory's the first to go," he tells the Doctor -- but he still remembers enough to tell the Doctor how to find the control room.
I really like the idea of Terminus being inadvertently responsible for the Big Bang by jettisoning its unstable fuel, leading to the explosion that created the universe -- and that's why Terminus appears to be at the exact center of the universe.124 It's a "big" idea in an otherwise small-scale story, but it never feels out of place here. In fact, it leads to some intriguing thoughts, which are never really explored but are still tantalizing to think about: if Terminus created the universe, what was there before? Is the Garm from the original ship or was it brought aboard? Plus it gives added impetus for the danger faced in the cliffhanger to part three and much of part four: if the jettisoned fuel the first time around was enough to create the universe, jettisoning the fuel a second time would be powerful enough to end everything.
But while there are big ideas driving the plot, the resolution is ultimately on a personal level; the Vanir wish to be free of the company and run Terminus on their own; the Garm is willing to save the universe in exchange for its freedom (to put it crudely); and Nyssa is cured and wants to help. This last one is the big one, because it means that Nyssa has decided to leave the TARDIS. Tegan is, predictably, unhappy about this ("She'll die here," Tegan says), but the Doctor seems accepting of the decision -- and, rather sweetly, Nyssa gives him a farewell kiss on the cheek.
Terminus is a story that often gets a lot of grief from fandom, but it's honestly hard to see why. There are a few questionable moments here and there, and some design decisions that don't work, but the core of the story is solid, and there are a lot of entertaining parts to a well-written script -- and one that seems to have had most of its plot bugs worked out ahead of time (not always the case at this point in the show's history). It's a story that strikes a fine balance between big ideas and small interpersonal relationships, and it does so in a suitably compelling fashion. Something of an overlooked gem, then.
124 That said, I know that the Big Bang wasn't an actual explosion and that the universe doesn't actually have a center. But it's still a nice big idea.