So! Watson would like to know why Miss Hudson is here. Holmes explains that she's recovering from a romantic problem and has been evicted now that her artist's wife has found out about her. "Muse" now turns out to have been code for "kept woman." And Miss Hudson will be staying at the brownstone for now, which Watson objects to on the grounds that she should have been asked. I'm not sure I fully agree. She's correct that roommates should be informed, but it's technically Holmes's place. Then Gregson texts them, so the game's afoot.
Holmes and Watson get to the scene of the crime quickly, since the L train is still running. I like that they used the phrase "still running," because it helps establish that the storm is definitely coming. The dead security guard's name was Frank Dempster. He'd been dead about three hours when the morning shift found him, and the security footage was gone. Holmes says Dempster let the bad guys in and was shot. The police already knew that. Then Holmes stands next to some blood on the wall and waits for Watson to catch up. She realizes Dempster shot a bad guy. She adds, "A through-and-through like that would require medical attention." Bell says they've already got a call out to the local hospitals.
Bell explains that the thieves went upstairs to an electronics store and stole a new phone called a "Toshiwo Verzia 8" that wasn't supposed to come out for another day or so. They got the floor models and two hundred more from the back. Holmes finds a synthetic hair from a cheap blonde wig, so he concludes there was a woman involved. He also thinks the presence of a wig means that they weren't planning to kill the guard. His logic is that there's no point using a disguise if you're not leaving any witnesses. He seems to be wrong about that, since they killed the guard right away. Also, it seems like a good policy to always have some sort of disguise when you're on a caper. You never know if there's an extra witness or something. And he says there were at least two accomplices because someone who's been shot through the stomach isn't going to be moving a lot of boxes. Also, probably a driver outside. Holmes thinks this is a pretty straightforward, since when they find the phones, they'll have the killers. So he doesn't really need to be involved at this point. Then the lights go out. The whole block is blacked out! Holmes comments "Well if I have to solve this in the Stone Age, I suppose it might be interesting after all."