This is the TV soundtrack to the original, missing story with some narration from the wonderful Frazer Hines.
The story itself is pretty mundane, the soundtrack isn't of great quality (but I know for the time this was mixed and edited they didn't really have the technology to sharpen it), but Hines' narration is pretty good and helps to visualise what's going on; but at times, I think a little bit more narration/description could have been needed. Perhaps the Target novelisation is clearer.
Although I will say the Doctor seamlessly switching between pretending to be a German doctor to an old woman to a redcoat was mildly amusing.
This story is really only notable for Jamie's introduction, and without that, I reckon this story would be almost as forgettable as The Twin Dilemma or The Tsuranga Conundrum.