Well, good, we got some live action stuff back, just in time for the Yetis to attack the base, kidnap Professor Travers, and knock out Anne.
Well, here’s the problem for the Doctor: that reporter guy decided to try and find the TARDIS for himself and get the heck out of there on his own. Considering someone keeps tampering with the Doctor’s investigation and leaving tracking devices on various people, the Doctor opts to level with the Brigadier and tell him about the TARDIS and a bit more about who he really is.
The Doctor doesn’t generally do that, but that does mean that the Brigadier realizes the TARDIS could be used to escape the Yetis’ web if the soldiers can get to it, so it’s off to find the TARDIS before the reporter or the Great Intelligence does.
That sounds like a good plan. Heck, the fungus is even flammable in places. If there weren’t a traitor somewhere in the group, the plan might even work.
Yes, there is still a traitor, and since soldiers keep dying, it really limits the possible suspects. Now, I know the Doctor, Jamie, and Victoria are innocent, but that’s only because they’re the current stars of the show, and Doctor Who doesn’t really swing that way. But it does mean Yetis have a bad habit of smashing experiments, stealing important stuff, and generally just causing trouble for everybody. The Brigadier had a tracker on him, and when he and his remaining soldiers went up to street level, the Brigadier alone returned from the fight because like all good Doctor Who villains, Yetis are bulletproof.
But the worst may be the Doctor getting ambushed with what looks like a brainwashed Travers on the Yetis’ side. And since that ended the episode, I won’t know what happens next until I watch the next one. That’s usually how these things work.