The sun is out and Dexter (Michael C. Hall) is cleaning his boat as season 7, episode 5 of “Dexter” (which aired Sunday October 28, 2012) starts. Dexter is having a conversation with Harry (James Remar). They are talking about Debra (Jennifer Carpenter) and how her knowing Dexter is a killer is going to destroy her. Dexter makes the argument that she is stronger than Harry ever was and that she is adjusting and getting better with it. Harry tells him that she is strong, but eventually it will eat away at her. It is then that Dexter finds some blood. Using his kit he sees there was a lot of blood. He is worried.
At Miami Metro Masuka (C.S. Lee) has found out that LaGuerta (Loren Valez) has been using another lab to process some stuff. He asks Debra about it and tells her that LaGerta is having a blood slide she found at the scene of Travis Marshall’s death analyzed by another lab. He wants to know if he is getting fired. Deb calms him down and says she will talk to her. She goes to LaGerta’s office and finds out that she is investigating the Bay Harbor Butcher case. LaGerta tells Debra that she found the slide at the church where Marshall was dead and that she thinks he Bay Harbor Butcher might still be alive and killing people. She confides in Debra that she never believed it was Doakes and Debra says she felt the same way. Debra offers to help her and LaGerta is thankful for the help. With the case file in hand Debra goes to the elevator where she explodes with curse words. She is mad as hell at Dexter.
Dexter is in his lab running the blood from his boat. He finds out it belongs to Louis. Debra walks in and tells him about the blood slide LaGerta found and that she is now looking into the case. She pulls out three pages with several pictures and names on each. Debra tells him these are people who have gone missing since hey solved the Bay Harbor Butcher case. LaGerta thinks hey fit the BHB’s profile. Dexter points out three of them that he killed. Debra is shocked by this. He tells her about one of them and how he stalked him at a wedding where the guy worked as a photographer. Debra says she will make sure it is her that talks to the families of those three as they do the investigation.
Dexter goes home and sees that his curtains are open – not how he left them. He thinks someone either was inside or is still inside. He goes to his car and calls his answering machine leaving a message that makes it seem like he is supposed to meet someone somewhere and isn’t coming home. Inside his house Isaak (Ray Stevenson) is waiting for him. Isaak hears the message and leaves. Dexter follows him to a restaurant and then calls him via the restaurant’s phone. Isaak tells him he killed Louis and that he plans to kill him and other cops as revenge for Viktor. Dexter tells him it was he alone who killed Viktor.
In a parking garage Dexter meets Debra and tells her about Isaak coming after her and other cops. He tells her he killed Viktor and how he found Viktor’s print on the car at the scene of Anderson’s shooting. She is pissed off. She is a rage of frustration. He tells her he can keep her safe and that they will need to stay the night at a motel he knows is safe. She makes him swear that he will never conceal evidence from a case like that again. He tells her he thinks he can promise. She realizes that she will never know when Dexter is telling her the truth.
As Dexter is stalking Isaak he gets a call from Batista (David Zayas). Hannah McKay (Yvonne Strahovski) is coming in to help them find the rest of the bodies of Wayne Randall’s victims. She tells them that they would hide in hotels by killing the people in the room and using the room. She says that he would kill them and make her dig the holes and she was scared that any of these holes could be for her. Dexter realizes that she doesn’t seem scared or nervous. She seems nostalgic.
That night at the motel Dexter tells Debra that he has a plan to deal with Isaak that doesn’t involve him killing him. The two reminisce about the last time they shared a motel room. They were kids on vacation at the beach. Debra tells Dexter that he was her hero when they were younger.
The next day at the dig site Batista asks Dexter if he thinks the bartender who killed himself and left the note confessing to Anderson’s murder was really the guy who shot Anderson. Dexter tells him he knows for sure he pulled the trigger so it looks like it. Hannah comes over and talks to Dexter they have an odd conversation about the first time they saw a lot of blood and a dead person. Dexter says his was on the job. She tells him hers was one of Wayne’s victims.
Debra arrives at the house of one of the missing people that LaGerta suspects might be another Bay Harbor Butcher victim. It is the guy who Dexter killed that was the wedding photographer. LaGerta shows up because she was in the area. They go in and talk to the guy’s son who is glad he is gone. His father beat him and his mother daily. The day he disappeared was this kid’s best day ever. They look through some of the wedding pictures from the last job the guy did. Deb sees one that has Dexter in it. She quickly suggests that she take the whole box back to the station and go through it carefully.
Back at the dig they find two bodies, a married couple. As Dexter works the scene he realizes that the woman was killed by someone smaller than Wayne. It was Hannah that killed her. He doesn’t say anything. Later as he is getting ready to leave Hannah talks to him and Dexter tells her his theory that she killed the woman. He details how she did it. She actually seems turned on. She flirts with him and says she has immunity. As he leaves the scene he notices Isaak following him
Dexter makes sure not to lose Isaak. He leads him to a bar that he knows is frequented by Columbian drug dealers. They are at war with Isaak’s group. Dexter goes into the bar and then slips out the back and lets the Columbians deal with Isaak.
Back at the department Deb folds the picture of Dexter at the wedding up and puts it in her pocket. They get the call that there was a murder at the bar Dexter just left Isaak at. When they get there they find three dead Columbians and Isaak nowhere to be seen. However, Dexter thinks the killer (Isaak) was wounded in the fight. He collects blood.
Quinn goes to the strip club to meet his stripper girlfriend. In the back room Isaak and George (Jason Gedrick) talk about Quinn. They say he is known to be a dirty cop. When Quinn leaves he finds a bag of cash on the passenger seat of his car. He puts it in his glove box.
Dexter runs the blood from the bar and finds that it is Isaak’s. They arrest him and he is met by his lawyer. Later that night Batista goes to Debra with his theory that the bartender was not Anderson’s killer. She blows him off and orders him to let it go. He isn’t happy. Neither is she. She just lied to Batista to cover for Dexter.
Dexter goes to visit Isaak in jail. Dexter wants to know why Isaak wants to kill him. Isaak tells him to get vengeance for Viktor. Dexter asks if it is over now that Isaak is in jail and Isaak tells him this haunting story about a man waiting decades to get revenge. This is clearly not over.
That night Debra shows up at Dexter’s with the picture from the wedding. He thanks her for saving his ass. She tells him that she doesn’t want to be involved in that part of his life anymore. She knows he won’t stop, but she doesn’t want to be involved. She can’t live like he does with all the lying, stealing and covering up. They again talk about their vacation at the beach when they were kids. She talks about how she would always chase him, but never catch him. He was always just out of reach. She then asks if they got the blood report back from the bodies that Hannah led them to. He says they did. When she asks if there is anything she needs to know about the case he says no. She gives him a look that tells him she knows he is lying to her. She takes her beer and walks into the other room.
As this episode of Dexter comes to an end Dexter takes the picture of him at the wedding and lights it on fire. As he holds it over the sink he realizes that from here on out he will face the depths alone.