Meanwhile, Quinn is working it at the stakeout, which means flirting with hot girls. Deb and Batista are watching from a tiny van, which is the Miami version of coffin torture. Deb is pissed and Batista accuses her of being jealous. He also says that Quinn is a good guy, but she should stay single as long as she can.
Dexter makes it to the marina. He finds Lumen and tells her to show him the body. Stiles is such an odd actress. I almost feel like she's lying, but I really don't think she is. Dex explains to her that everything she does leads back to him. She takes him to where the body was. It's gone. Dex tells Lumen to shut up while he uses his expertise to find out where the bleeding dude went to. She doesn't understand why he knows so much about blood.
Dex asks her to explain why she was sure that the guy she shot was one of her attackers. At every detail, Dex picks it apart because he doesn't believe that she really knew that she was shooting one of her attackers. She says that she knew him from his smell, which makes Dex apoplectic. She says that she's the proof that he did it. It's her memory and experience. She tells him to leave and that she will find him on her own, but luckily for everyone he doesn't listen to her. He proceeds and finds the trail.
Batista and Deb are still in the van when they get a call alerting of a possible homicide... at the marina. Deb says that she will go. After she's gone, Batista starts staring at a pretty lady who is being picked up on the surveillance in the club.
Dexter is using all of his fancy blood equipment to track down the shot guy. He gets a call. There's a crime scene he has to attend to. Um, and it's where they are. Lumen freaks out that he's a cop, but he doesn't indulge. They have a lot of work to do. Lumen tells him that the guy she shot used to stick his fingers in her mouth to keep her quiet, but Dexter doesn't believe her. He finds the guy hiding under a grate.
Batista approaches the pretty lady in a club. AND, he picks her up real quick and leaves the club.
Dexter pulls the guy out of the hole he was hiding in and checks his wound. The guy is a children's dentist, but Lumen insists that he's a rapist. Dex seems confused. He sends Lumen to the corner. He gets a phone call from the nanny. Dexter sings to Harrison, while the guy is bleeding to death in the other room with the woman who shot him and he possibly raped. This all makes sense, right? Dex returns to find Lumen stuffing her shoe in the guy's mouth. He takes her aside and tries to insist that she chill, but instead they hear the guy talking on a cell phone.