By Montykins
Holmes is engaged in the perfectly normal activity of choking corpses, because he apparently doesn't know that there's already an extensive body of knowledge on the subject of postmortem wounds. But it's okay, because he spots one body that bears evidence of being secretly murdered. After Holmes and Watson barge their way into the hospital room where it happened, they're on the trail!
First, though, they have to find out their victim's name, because the hospital administrator doesn't like Holmes. So they track down a barista named Dave, who was hitting on a perfume saleslady who was the victim's neighbor. Armed with this knowledge, they learn that there was a mysterious doctor who met with the victim at night.
Holmes studies all the medical records in the world, but Watson manages to narrow things down with her expert medical knowledge of how someone might steal epinephrine. This gives them nine victims of what is clearly an Angel of Death, and twenty-three potential suspects. None of them pan out, although they catch one of them stealing morphine. And that one gives them a little bit of information that eventually leads to them deciding that the killer speaks Ukrainian. And that means it was secretly the janitor all along!
Except we're not done yet, because there's still something that bothers Holmes. One of the victims doesn't match up with the Angel's usual plan, and the reason is that the head of surgery made a mistake and covered it up by getting the janitor to murder the evidence. Weird, right?
And while this whole thing is going on, Watson is reconnecting with an old friend. And she's also using her newfound deductive skills to instantly diagnose a case of endocarditis from just some mildly discolored toenails. The show pretends there's some doubt about the diagnosis, but there isn't, really.