Lestrade returns to assist Holmes and Watson on a case about a bombing in NYC. However, his return is nothing but an annoyance to Sherlock and Lestrade works hard to convince him that he is now successful. When it turns out that Lestrade’s new boss may have something to do with the bombing, he confesses that he has been nothing but a pimp to his bosses sex fetish.
Sherlock and Watson solve the case and the bomber ends up being a woman from Balsille’s conquests before Lestrade started to work with him.
Holmes also tries to condition two fighting roosters to be able to co-exist peacefully with negative and positive reinforcement. In which, he succeeds.