The one where the Doctor blows the bad guy to smithereens...
The dog whistle that the Doctor has perfected for K-9 Mark II also seems effective in summoning Shrievenzales, but not - oddly - K-9 himself. The whistle is used twice in this episode to attract the unconvincing lizard creatures, and on both occasions K-9 stays put and does not heed the call. Maybe the Doctor can whistle different notes? Or maybe it's just a neat little convenience? Either way, it means we see slightly more of those ridiculous monsters with their floppy claws and lumbering gait, and which look like nothing more than men in rubber suits rolling around on the floor.
Thankfully, there's more scenes between Binro and Unstoffe to cheer me up. Those two together are lovely. Timothy Bateson is obviously a seasoned professional who, despite affecting a country bumpkin accent, manages not to send up the part one iota. Nigel Plaskitt was much less experienced as an actor, and actually ended up specialising as a puppeteer, but is so gentle, warm and convincing here that you'd think he'd been going for years. He is so good with Bateson. The scene where Binro says that just knowing he was right about the stars and the planets is heart-breaking. "It's worth a life."