According to my data, you should not exist.
The pug-headed Sontarans aren’t the only ones tinkering in Bob Baker and Dave Martin’s “The Sontaran Experiment” (Story Production Code 4B). This brisk story marks the first time since the sophomore season that Doctor Who has aired a two-episode tale, and surprisingly, the abbreviated format works to some effect. It’s also the very first story to be shot entirely on location, with no studio scenes of any sort. And, alas, it’s the fifty-second story (give or take) to relegate the female companion to being captured and/or screaming a lot. The more things change…
Baker and Martin skip over quite a bit of exposition, getting our time travellers directly into the action. No sooner have they arrived on a theoretically abandoned Earth, via transmat from Space Station Nerva—continuing where “The Ark in Space” left off—than they all split up. The Doctor sends Sarah and Harry away to let him concentrate on fixing the transmat beacons for Nerva, then Harry falls into a pit, then Sarah tries to find the Doctor for help, but he has been captured, then Harry finds a way out of the pit, then Sarah is herself captured at the pit trying to rescue Harry on her own. (Whew.) And that’s just the first twenty-five minutes. In the Troughton era, that would have taken three episodes.
Granted, there’s not much story on offer. As is tradition, “The Sontaran Experiment” still keeps the titular menace off-screen until the very end of the first episode, and the total elapsed time between the real menace of the Sontaran threat being revealed and the Doctor foiling it measures no more than seven minutes. Tom Baker’s Fourth Doctor works well within these narrative constraints. His manic mien matches the madcap pace, and as a result, his incessant japes in the face of danger and his emotional non-sequiturs feel more natural, at least to the extent that is possible. As opposed to Tom Baker’s first two stories, where everyone and everything around him seemed to be moving in slow motion, here the entire mise en scène works in concert with his frenetic strengths.
Along the way, we learn that the far-flung human colonies mentioned in the prior story have survived, and indeed thrived, in the centuries since solar flares devastated Earth, spreading out to create an empire. That empire faces invasion from the Sontaran Empire, who, to the Doctor’s estimation, deem human space as a strategic resource in their eternal war against the Rutan. Baker and Martin’s create the illusion of depth with a subtly sketched skien of details, many of which rely on explicit knowledge of the prior story. Indeed, even the revelation of the Sontaran, Field Major Styre, at the end of the first episode hinges, for its emotional impact, on knowledge of the initial Sontaran story, “The Time Warrior,” as Sarah utters the name of the Sontaran she and Jon Pertwee’s Doctor encountered, Linx.