Dept. Q: Season 1, Episode 4 - Episode 4 (2025)

The episode opens in the past with Merritt Lingard in the moment she is abducted. She retrieves William's hat from the ferry, then is suddenly grabbed from nearby and forced into the back of a car by someone whose voice she seems to recognize. When she regains consciousness, she finds herself sealed inside a pressurized hyperbaric chamber, confused and trapped.

In the present, the Department Q team continues working through Merritt's missing-person case and the huge volume of material connected to it. Akram goes back through Merritt's files and finds a flower-shop card signed only with the initial "S," which suggests that she had arranged to meet someone privately at a hotel.

Carl follows that lead by questioning Liam Taylor, Merritt's former colleague and lover. Liam admits that he had a brief affair with Merritt that lasted about a month, says it was kept secret from his wife, and explains that Merritt ended the affair herself. He also says they met at the Prince's Garden Hotel and that Merritt always paid. He reveals that when she used the hotel, she did so under the false name Lila Graham, her mother's maiden name.

Carl then goes to the Prince's Garden Hotel and pressures the receptionist into giving him the guest records. The records show that Merritt had used the same room six times in the two months before her disappearance. The authorized name on the account is Liam Taylor, but the last person linked to the room is not Liam; it is Sam Haig.

The identification of Sam Haig shifts the investigation again. The team realizes that the mysterious "S" may refer to him, and that Merritt's private life was more complicated than they had understood. The episode frames Sam as connected not just to Merritt's affair history, but to the larger truth behind her disappearance, including the fact that his death is somehow tied to her.

The episode ends back in the chamber with Merritt confronting her captors. She asks whether she has been trapped there because of Sam Haig, and they tell her no. Even so, they make clear that Sam is dead because of her, leaving Merritt with the implication that her past actions have directly led to his death.

Episode 4 ends with the investigation shifting in a new direction after the team connects Merritt's past to a man named Sam Haig. The episode closes on the idea that Merritt's private life is not separate from the disappearance case, and that someone in her orbit has died because of that connection.

In the ending sequence, Carl and the team have been piecing together Merritt's movements and relationships, and the search turns toward the name "Sam Haig." The episode does not resolve Merritt's fate yet; instead, it pushes the case forward by revealing that Sam was tied to Merritt and that his death matters to the mystery. The final beat is a cliffhanger, with the investigation now pointing beyond the original assumptions about Merritt's disappearance.

More fully, scene by scene, the ending plays out like this:

The team continues digging through Merritt's background and keeps finding contradictions in her relationships and movements. Rose goes to the island to look into details Carl could not confirm himself, while Akram finds a note that sends the case in a different direction. The investigation also uncovers that Merritt had been living under another name, Lila Graham, and that she had been staying at a hotel repeatedly before she vanished. Carl follows that trail and pushes for answers from the hotel staff, which reveals that she had used the room several times and that different men were linked to her stays.

That line of inquiry leads to Sam Haig. The episode shows that Merritt had a sexual relationship with him, and the discovery makes it clear that his death is connected to her in some way. The ending does not explain the full chain of events around Sam, but it establishes him as a crucial figure and confirms that Merritt's past actions are now directly tied to the larger case.

As the episode closes, the story leaves the viewer with a sharper sense that Merritt's disappearance is part of a wider pattern rather than a single isolated event. Carl's team has not yet found Merritt, but they have reached a major turning point: the mystery has expanded from a missing-person case into a deeper web of hidden relationships, false identities, and death connected to Merritt's life.

For the main characters at the end of Episode 4:

• Merritt: still missing, and her case is now linked more clearly to Sam Haig and to her hidden past.
• Carl: still leading the investigation, now following the Sam Haig thread.
• Akram: continues working the case and helps redirect the investigation with the note he finds.
• Rose: goes to the island to gather information Carl could not obtain.
• Sam Haig: revealed as a man connected to Merritt, with his death now part of the mystery.

No post-credit scene is indicated for Dept. Q, Season 1, Episode 4. The available episode information and recaps describe the episode ending with the investigation taking a new turn, but they do not mention any mid-credit or post-credit stinger.

The clearest episode-specific source says Episode 4 ends when "Akram finds a note which sends the investigation in an entirely new direction," which is presented as the end of the episode rather than a credits-tag scene. Another recap similarly says Episode 4 "comes to an end" at that investigative beat and then transitions into what happens in Episode 5, with no mention of an extra scene after the credits.

If you want, I can also summarize the actual ending of Episode 4 scene by scene.

Sam Haig is identified as a key figure in Merritt Lingard's past. Merritt was last seen with him at a hotel, and according to her abductor, Sam Haig was dead because of her. This connection is a significant lead in the investigation in Episode 4.

Merritt Lingard goes to retrieve William's hat on the ferry but is suddenly grabbed by a man wearing the hat and is abducted. She wakes up inside a sealed, pressurized chamber where she panics and tries to get help, but loud music is played to silence her.

Carl Morck develops the theory that there were two assailants involved in the Leith Park shooting. CCTV footage and physical evidence suggest it would have been impossible for a single shooter to enter quietly or wait inside, indicating multiple attackers.

Carl is dealing with guilt over a past shooting that left his partner paralyzed and a younger officer dead. He also struggles with his responsibilities as a stepfather to Jasper, which complicates his emotional state and therapy sessions with Rachel.

Merritt's return to Mhòr after the attack on William was to attend Harry Jennings's funeral. Harry Jennings was the man who attacked William, making this visit a notable plot point that ties past events to the current investigation.

No, Dept. Q is generally not family-friendly for children or sensitive viewers. Episode 4 sits within a series that is rated TV-MA in the U.S. and is described as having severe violence/gore and severe profanity, with moderate frightening/intense scenes.

Potentially upsetting or objectionable elements that may appear include: - Graphic violence and blood: shootings, visible bleeding, and other brutal injury detail are part of the series' content. - Disturbing crime material: the show involves kidnappings, abuse, murder, and references to rape/sexual violence. - Strong language: frequent use of the f-word and other profanity throughout the series. - Threats and intimidation: at least one scene involves a threatening sexualized menace toward a teenager. - Dark, intense tone: reviewers consistently describe the series as bleak, suspenseful, and heavy. - Alcohol use: characters drink regularly, though this is a lesser concern than the violence and language.

I don't have episode-4-only scene-by-scene ratings in the provided results, but the series as a whole is clearly aimed at mature audiences, not children.