Lumen turns up at the crime scene where Boyd's stocked and preserved bodies have been discovered following a traffic crash, where she is spotted by Quinn, who asks Liddy to investigate her connection to Dexter. She identifies Cole Harmon, Jordan Chase's head of security, as one of her torturers, and manages to save Dexter from a surprise attack by Cole when Dexter attempts to gather information from Cole's house. Setting up base at the hotel where Jordan Chase is giving his seminar, Lumen assists Dexter in preparing for the kill. Cole spots her in the lobby and gives chase, with Dexter barely managing to save her from Cole. Unable to extract any information from Cole, she watches while Dexter kills him. They then dispose of the body by dumping it in the ocean from Dexter's boat, and Liddy is seen photographing them. After the police uncover DVDs of the men torturing and raping female victims, Dexter switches Lumen's DVD with a blank DVD, which he scratches in order to avoid suspicion as to why it was blank. Lumen then acknowledges that she knows what a risk he is taking by being with her, and tells him that he has been her only way through the experience. Lumen proves instrumental in getting information from Emily Birch, the first victim of Chase's team and the only other known survivor. Tilden is Lumen's first kill, as Dexter allows her to make the killing blow at her request. The two then return to Dexter's apartment, where they have sex. Lumen and Dexter begin to plan how they will capture Chase when they realize that they are being watched. Once Dexter determines that they are being watched by the police, he attempts to convince Lumen to leave Miami for her own safety. However, Lumen refuses to abandon him, and Dexter ultimately admits that he wants her to stay. After receiving a distressed call from Emily, who says Chase contacted and threatened her, Lumen goes to her house to reassure her, having been unable to contact Dexter. This was a trap meant for her and Dexter, however, and Jordan Chase murders Emily and takes Lumen back to Camp River Jordan, which he owns, and which is the location where each of the victims was originally raped and tortured. Dexter arrives at Emily's house to find that Lumen and Jordan have already left and he is able