I really like it when we get a non-western historical, and it's done really well here. There's definitely a fair bit of playing into the martial monk stereotype, but I think at least with the reveal it definitely works here.

Generally this was a really fun story, the idea of sontarans using post hypnotic suggestion to make monks killers and take over the world does feel a little outside their normal wheelhouse, but it's explained in the comic itself that they're unable to clone themselves, so it works, training people to kill (though killing most of those they train themselves in the final battle), so that they can rule does work pretty well, and I love that it's genuinely a surprise when they show up, but one that still works.

I also really like K9 using a recording to turn off the 'kill switch' at the end, it's a fun use of K9's abilities and one you wouldn't think of at first when reading the comic, but makes complete sense as a counter in retrospect