This episode Space Precinct are doing their take on Star Trek‘s classic episode “Wolf in the Fold”, albeit with less misogyny.
An officer from the 79th Precinct is killed on 89th Precinct territory, and it transpires she and her partner were on the trail of a serial killer who looks like a less antisemitic Nosferatu and who seems to vanish without trace. Our heroes team up with the surviving officer, who gives Haldane a run for his money in gratuitous obnoxiousness (and the writing team do have fun with this, having the pair try and out-snark each other).
It eventually transpires, courtesy of a Tarn legend, that Nosferatu parasitically inhabits a host, emerges to do his killing, then disappears back into the host. And the host is, surprise, the surviving officer. Inevitably, perhaps, the officer gets shot and Nosferatu transfers to Brogan… but in a more interesting twist, Brogan then contrives to get himself electrocuted in a situation where the only available alternate host is Slo-Mo, who, once Brogan’s been medically revived, proceeds to delete Nosferatu from his RAM.
The good news on the diversity front is that Carson is back. The bad news is that he seems to be playing Generic Police Officer rather than Computer Expert, and indeed Carson’s area of expertise will continue to vary wildly depending on what the series needs him to do. But still, at least the human population’s a bit more genetically varied.
I should say, however, that I am now starting to notice the re-use of alien masks, though it says something that it’s taken 15 episodes. Less positively, though, the reuse of sets is getting really obvious: they’ve got one office, one flat, one entertainment venue, one street, and it shows.
Also, there’s an emerging trope of getting Castle into undercover roles where she’s got to wear sexy outfits. She does look nice in them but… don’t, writers. Just don’t.
Final (and positive!) world building point; the Brogan kids’ rooms are quite believably decorated, with random stickers on the doors and young Liz having an impressive collection of saccharine unicorn posters. Whoever did the set design on those has clearly been around preteens and early teenagers a lot.