At Maria's place, she's cooking dinner with Miguel. He says that he is surprised that she called, but glad. He says that he has been thinking of her since way before the Ellen Wolf stuff, which really has nothing to do with the two of them, does it? I guess he went over there that night to comfort her about Ellen, but it seems more like the writers' way of letting Maria react. Kind of clunky. She says that they were different when they knew each other in the old days. He leans down to kiss her, but she stops him because the water is boiling on the stove. She says that she bought some beer for him, but she left it in her car. Miguel offers to get it, but she says that she will. She grabs Miguel's keys on her way outside. As Dexter watches from his car, Maria wraps tape around her hand and gets a sample from the back of Miguel's SUV. Dex VO's that Miguel probably thinks he's getting lucky tonight, when, in fact, he's getting screwed. Maria puts the sample in her car and goes back inside.
Later, Dexter is flipping through the radio stations, searching for some marching music, when Maria walks Miguel outside. Dex VO's that they make a cute couple, but both of them are lying through their teeth. After Maria has gone inside, Miguel starts his car and prepares to leave. Then, he gets out -- because THE BACK DOOR OF HIS SUV IS STILL OPEN. Maria didn't close it properly. As he closes it, he stares blankly ahead and Dex sees and intuitively VO's that Miguel looks like he knows something is up with Maria. He can't let him do anything bad to another innocent person.
The next morning, Dex arrives at work and VO's that on his to-do list for today is finding a "non-blowback" way to dispose of Miguel's body. Suddenly, Maria arrives with the sample she got last night. She asks Dexter to run the sample for matches with victims from the last 10 days. He reminds her that he's the "blood guy," but she says he also runs forensics and she can trust him to keep the results off the records. He agrees that keeping secrets is one of his strong suits, however, she ripped him a new a-hole the last time he did work off the grid. She says that this is different -- she has a voice nagging her. She hopes that she's wrong, but if she isn't and anyone finds out that she was investigating, a "shit hurricane" would be brought down on the entire department. Now, think about that for a moment. Literally. A shit hurricane sounds like the most horrible thing ever. If she's right, she says it will be the same hurricane, different landfall. Either way, Dexter will need a raincoat. I wish I got to talk like that without joking. She says that she doesn't want Dexter to get into any trouble, but he tells her that he's fine with giving her something under the table (he acknowledges that the statement sounds a little odd). He tells her that he'll get the results for her ASAP. Dexter sits down and enters into a computer system the request. It requires an authorization code, so Maria enters hers. The request is approved (Maybe he was reserving space in the lab?) and Maria tells him that he's the best and leaves. He says to himself that he has to be the best as he looks at a screen listing the victims from the past 10 days.