[3] They are given new identities and moved to a flat in Swindon where they find their very recent past coming back to haunt them whilst they attempt to blend in with their surroundings.
Leanne meets a young man called Patrick in the street, and the girls go to a party at his house.
Sergeant Forrest is tricked into stripping, masturbating and singing on webcam by hitmen Appraisal and DJ Sound as Fuck, by pretending that they are an attractive young woman.
The hitmen record him, and he is later shown the video on a phone by one of the gang, Ian, who confronts him in a toilet and blackmails him into sabotaging the investigation into the murders.
Sergeant Forrest is being pressured by the gang to reveal the whereabouts of the girls, and plans to flee to Spain.
The cat that hitman Gareth Pugh (known as Appraisal) stole from the old woman that they killed is discovered by his mother.
Forrest meets three members of the gang, including Ian, and gives their address to the girls.
Forrest repeatedly runs over Ian, killing him - then flees to the airport - where he phones the girls to tell them that the gang know their address.
The gang meet, where their formidable head honcho, Willy Whelan, learns that Ian was killed.
DJ Sound as Fuck earns a newfound respect from the gang for murdering Appraisal, much to the annoyance of Benny.
Determined to uncover the identity of Charlie Little Pockets (whom he assumes is a gang member instead of a teddy bear), Benny visits Jackie in hospital.
Leanne puts on a Russian accent and pretends to be Ian's other woman, prompting a physical fight with his fiancée.
Patrick sinks deeper into a life of crime - including burying a corpse with One-Pack - but a mysterious correspondent (whom he is unaware is Leanne) gives him a glimmer of hope.
Meanwhile, with gang insiders dispatched to kill him, DJ Sound as Fuck is set to meet a grim fate in the juvenile detention centre.
In the dramatic finale of Witless we discover whether Patrick really has crossed over to the dark side, if it's the end of the road for DJ Sound as Fuck, and whether Leanne and Rhona can make it out alive.
Patrick is put into witness protection, DJ Sound as Fuck reforms and starts revising for his GCSEs, Baz restarts his gang whilst Rhona and Leanne return home.
Leanne finds Patrick in Greece and travels there to live with him, sending a photo to Rhona in Christmas to let her know she's fine.