In Episode 3, Carl and Akram discover a circular logo with a bird on a cap worn by a man seen both in Merritt's house and on the ferry. Merritt finds inscriptions behind a paper in her hyperbaric chamber, indicating it had at least one previous occupant. These clues suggest someone has been watching Merritt and that her disappearance was not random but planned.

Carl and Akram travel to Merritt's hometown, Mhòr, where they meet local police and Merritt's father, who harbors resentment toward her. They learn about a violent incident involving William Lingard and a young man named Harry Jennings, who attacked William and later died trying to escape. This background sheds light on tensions in Merritt's family and possible motives related to her disappearance.

The ferry is the location where Merritt was last seen. Carl throws Akram's hat off the ferry to replicate the conditions of the day Merritt disappeared, but the hat flies back toward the parking lot instead of into the sea. This suggests that if Merritt had done the same, it could have given her captors an opportunity to grab her, indicating the disappearance was likely orchestrated by someone watching her closely.

Rose joins Carl's Department Q team in Episode 3. Despite Carl's complaints about her chewing and drinking habits, he immediately trusts her. Carl shares with Rose a suspicion that the original investigation into Merritt's disappearance was deliberately mishandled, and he wants the team to investigate the investigation itself.

Merritt discovers inscriptions behind a paper stuck to the wall of the hyperbaric chamber, indicating that the chamber had at least one other occupant before her. This chilling clue suggests a history of similar kidnappings or imprisonments, deepening the mystery of Merritt's situation and the intentions of her captors.