“Daddy Issues” makes the threat against Slough House more concrete without making the people behind it trustworthy. A stolen paper record gives Lamb something he can investigate, Taverner discovers the obligations attached to her funding, and River follows a provocation to his grandfather’s home. The episode’s title fits several kinds of dependence: family, money and the institution that can declare its own agents expendable.
- Released
- 2026-09-23
- Runtime
- 46 minutes
- Source novel
- Joe Country and Slough House
- Director
- Adam Randall
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Watch and read
Open the official programme page or explore the source novel.
Detailed plot
Reveal episode spoilers
Frank Harkness visits Andrew Nesmith, a former Dog who has been dismissed from the Park. Andrew stole a valuable file from Molly Doran’s archives for him. When Andrew becomes a liability, Frank strangles him and arranges the body to resemble a suicide. He does not finish the job of erasing witnesses. Andrew’s son Reece sees what happens and gets away, leaving Frank with a problem that cannot be solved by tidying the room.
At Slough House, Lamb divides the investigation. Shirley and Coe visit Kay White’s canal boat; River and Roddy trace Frank’s hired car. Roddy obtains the information quickly but stretches out the exchange in an awkward attempt to provide River with companionship. River is in no mood to appreciate it. The car takes him and Lamb to Andrew’s flat, where they discover the body. A camera across the road provides the useful lead: a boy was present, and may have seen the killer.
Shirley and Coe find no decisive evidence on Kay’s boat, although a nearby food seller remembers a man and woman visiting. The pair responsible are still working through their targets. They arrive at Moira’s house posing as gas engineers, incapacitate her and leave a gas leak behind them. The danger now extends beyond the office’s current occupants. Leaving Slough House has not removed anyone from the list being used against it.
Taverner meets Judd and Damien Cantor, the owner of a right-wing television channel. Cantor supplied the money Judd passed to her, and he wants an interview in return. Her refusal would risk exposure of that arrangement. Once his cameras are at the Park, he presses her on attacks and compromised senior leadership rather than giving her an easy public appearance. The questioning turns the interview into a demonstration of the influence purchased by apparently helpful money.
Frank subsequently meets Cantor, confirming that Cantor commissioned the theft. The missing file contains the identities of people who have worked at Slough House. Reece’s escape worries the men for a different reason: he can connect the theft to a murder. Lamb reaches Molly and learns what has disappeared from the archives. With electronic records already wiped and the paper record stolen, he orders the team to go dark and assemble at Blake’s grave. He collects Catherine himself, although the revelation about Charles Partner has made their relationship bitterly strained.
River does not follow the emergency instruction. Calls that he believes are coming from Frank have needled him throughout the episode. Roddy traces them to David’s house, and River heads there expecting another intrusion by his father. He sends Roddy out of the car and enters ready for a confrontation. The person waiting is Sid Baker. His presumed-dead colleague is alive, and the episode closes with River forced to reconsider another disappearance he thought he understood.
Turning points
Reveal turning points
The theft shows why a paper archive still matters. Removing a digital record may make the agents invisible to routine administration, but a physical list can make them visible to an enemy. The episode puts those two actions together without treating them as interchangeable. Lamb’s response is practical: he needs to know which knowledge has escaped, not merely which computer system has stopped working.
Reece’s escape punctures Frank’s confidence in controlled violence. A staged suicide depends on nobody witnessing the murder. The child’s survival changes the shape of the job and gives Lamb a route towards the person who commissioned it. Frank’s experience does not eliminate uncertainty; it encourages him to believe he has dealt with uncertainty until evidence proves otherwise. The investigation now has a person to find, rather than only a suspicious pattern to describe.
Cantor’s interview illustrates the difference between being First Desk and being free. Taverner commands a powerful organisation, yet she cannot comfortably refuse the man whose money helped her. The pressure arrives through a public conversation, which is harder to contain than an argument behind an office door. Once information can be broadcast, the Park’s usual advantages in secrecy become weaknesses.
River’s decision to abandon the rendezvous is understandable and dangerous at the same time. The traced calls appear to offer a direct route to the person who humiliated him at the funeral. Following them promises an answer that Lamb’s wider investigation cannot yet supply. Sid’s appearance turns that apparent certainty inside out. River has reached the correct house with the wrong explanation, a mistake that now opens a very different relationship to the past.
Book vs show
Reveal book and television spoilers
Sid’s reappearance belongs to Mick Herron’s Slough House (2021), the seventh novel. Bringing it into television Series 6 advances her return within the adaptation’s usual one-book-per-series progression. TheWrap’s interview with Gaby Chiappe explicitly identifies this consequence of combining the books.
The adaptation also replaces the sustained Welsh snowstorm setting of Joe Country (2019) with a story moving through London and its surroundings. Chiappe describes the filming challenge posed by that winter landscape and explains that Slough House became the main structure into which other material was folded.
The novel Joe Country introduces Lech Wicinski and his attempt to discover who destroyed his career. Here the stolen-record investigation proceeds through Andrew and Reece Nesmith instead. Catherine’s temptation to buy alcohol retains another strand named in the publisher’s account, while the episode gives it a place inside the newer assassination plot.
Characters and actors
Olivia Cooke returns as Sid Baker at the closing reveal. Harry Lloyd’s Damien Cantor shifts from a member of Judd’s circle to a figure with direct leverage over Taverner. Reece Nesmith becomes the surviving witness Lamb needs, while Molly Doran identifies the missing record.
Linked locations
The investigation starts at the Slough House office and moves through Andrew’s flat, Kay’s canal boat and the Park’s archive. Blake’s grave is the emergency meeting place. River takes the separate route to David’s house, where the final encounter unfolds.
Trivia
Chiappe told TheWrap that the decision to combine the two novels predated her arrival. The returning Sid therefore reflects a structural adaptation choice as well as a casting reunion. The same interview identifies the difficulty of planning a shoot around the snow required by Joe Country.
Questions and answers
What was in the stolen file?
It listed the identities of people who had worked at Slough House.
Who commissioned Frank’s theft?
Damien Cantor hired him to obtain the record from the Park.
Who is waiting at David’s house?
Sid Baker is there, alive despite River’s belief that she died after the Series 1 shooting.