Chapter 17 includes Harry sneaking into SI, but finding out he's too late to put a cage around the Loup Garu. MacFinn tears through prisoners, and then comes for Harry.
Chapter 18 starts with Murphy saving Harry's life using inherited silver bullets. This allows Harry to back off and take a breather, where he realizes that the silver bullets caused the Loup Garu to bleed, and he can use that blood to bind it!
In Chapter 19 Harry comes back to the fight, but dozens of SI cops have already been ripped to pieces. Carmichael sacrifices himself to save Murphy, and Harry finally hits the thing with the strongest Feugo we've seen up to this point.