Ugly-ass federal building. Mike shows up for his post-shooting counseling session with Juan Badillo (even though Briggs did the actual shooting, Mike has to go get his head shrunk because he witnessed it). Juan zeroes in on Mike's aspiration to be FBI director, and Mike spouts some idealism about defeating evil -- also, his grandfather was a crime scene photographer at the Hoover building, so he clearly has a lifelong infatuation with this particular agency.
Juan asks if Mike was disappointed to be assigned to Graceland, but Mike says he likes and house and the other agents and lets slip some of his man crush on Briggs. And then Mike figures out that Juan isn't a shrink -- he's Courtney Vance's man in California, checking on Mike's investigation of Briggs. Juan explains that if Mike nails this Briggs investigation, he's all but guaranteed the promotions he wants in DC.
Mike pops into Charlie's room to ask for advice getting Briggs to assign him one of his cases. She tells him to charm Briggs, to help him with a case -- he's been trying to get close to a bad guy named Bello. One way to help him get close is to give Bello something he wants. In exchange for the advice, Charlie wants Mike to go undercover as her boyfriend to a karaoke bar. Sure, I tell hot dudes that all the time: You're going "undercover" with me to the "karaoke bar."
Charlie shows Mike the house's prop-and-costume room, which has a delightful makeup mirror setup. He puts a jacket on him to try and rub off some of the unbearable preppiness. Jakes arrives and shows them one of the bullets, which gives Mike an idea of how to help Briggs with Bello.
Karaoke bar. The as-yet unseen roommate, DEA agent Paige, is up on stage doing karaoke in Korean. Charlie points out the gangster Paige is working, Bobby, and then they follow her to the bathroom. While Paige pees, Charlie grinds up some pills and drops them in Bobby's drink -- so that Paige doesn't actually have to sleep with him, the pills are literal boner killers. That seems... convenient. Mike is all, ahem. Your lady rituals are foreign to me and I am frightened.
Briggs and Johnny discuss Bello; Johnny's Malaysian contacts are no use unless Bello likes fur. So Mike comes in with his bullet idea: Briggs tells Bello he knows a Marine who can get him a bunch of illegal cop killers, and this will endear him to the kind of person who likes illegal cop killers. Briggs shoots down Mike's idea, but he seems intrigued.