Series 4, Episode 4.
After the attack on Arnott, DCI Huntley picks up her husband outside his office and advises him to go back inside away from CCTV and ask security to look for Arnott. Arnott is found to be badly injured, but alive. Nick Huntley is interviewed by Hastings and Desford. He says it was a complete coincidence that only he knew Arnott was to be at his office building when he fell down three flights of stairs. He did not explain why his car was seen near Ifield’s flat when Ifield was murdered. Nick said his wife was asleep in the spare room that night. Nick’s solicitor, Jimmy Lakewell, says very officiously that with no evidence or CCTV, Huntley should be free to go. AC-12 find a CCTV image of a man in a balaclava by Nick’s offices at the time of the attack on Arnott.
In her car, Nick and DCI Huntley argue, Nick stating he had seen her going into Ifield’s flat that night. DCI Huntley says she was having an affair. Quizzed by Hastings in hospital, Arnott is unable to identify his attacker. At a meeting in his club, DCI Huntley appeals for Hilton to help her by making an official complaint against AC-12 and closing the case against Farmer. Hilton says there are some things he could tell DCI Huntley to help her with AC-12. Despite her friendliness, she rejects his advances, but suggests they meet again.
DCI Huntley and Fleming talk with Kevin Gill, the forensics officer, KRG. DCI Huntley’s wrist injury is now considerably worse; she has it examined by a doctor, who takes a swab. DCI Huntley and her husband argue again, at home. He says he cannot believe anything she says any more and he knows she was in the flats where the murder happened. She slaps him, twice; he breaks down.
AC-12 finds an anomaly in the second forensic examination of KRG-13, the blood-spatters sample with the overwritten label: traces of white fibres from a forensic oversuit. DCI Huntley is interviewed by AC-12. After running through evidence, Hastings says he will be recommending she be suspended from duty immediately. DCI Huntley then turns the tables, accusing Hastings of sexism. She has identified Fleming as an undercover AC-12 officer in her team. DCI Huntley asks Hastings whether he is a mason.
All through this altercation, a clearly-rattled Hastings is asking her where she is getting this information. She suggests Fleming was induced to tamper with evidence concerning Ifield’s murder, accuses Hastings of a conspiracy to pervert the course of justice in the case against her, and brandishes a supporting letter from Hilton, recusing AC-12 from their inquiry.
Hilton and DCI Huntley meet again at his club, but DCI Huntley again rejects him, saying she loves her husband. Afterwards, PC Maneet Bindra is seen handing a file to Hilton