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Interview with show writer Gwyneth Hughes.

While on a trip to visit her grandfather, an attractive mother and two of her children mysteriously disappear. This leads to a desperate search to find them before it's too late.

Matt learns the shocking news that his missing wife, Leanne, is pregnant while attending a press conference organized by press officer Defne Topcu; Hazel is suspicious that her son Kyle may have been involved with the abduction and makes a call to the police; a major breakthrough happens when the flower seller is located.

Following the 28-day police review Barclay has turned Leanne's missing persons case in a murder investigation and Kyle Betts is the prime suspect; Matt spends his birthday in the company of Sarah, much to the displeasure of Leanne's parents; Farnes and Matt also discover that that Leanne bought a one-way airplane ticket to France, where her ex-husband lives, days before her disappearance.

With the investigation in it’s fourth week, Matt become further estranged from Leanne’s parents in part because he gives an interview with a TV crew and also because of the constant presence of Sarah Wheeler in his life. Tanya and her estranged father attend a local fair which ends with a grisly discovery.

The discovery of a burnt out van offers some new evidence to Barclay's investigation, as the suspect slips away; Matt joins Gary with the police, in a stakeout at the home of Hazel Betts; Amy celebrates her retirement with a party at a pub; several new clues bring Barclay and his team close to solving the case.

Off-duty police officer Laurie Franklin finds herself caught up in a strange sequence of events after a person falls in front of her train.

One day later the police are struggling to find out more about how the victim died, and the abandoned baby's identity is still a mystery.

A week on, the police carry out a reconstruction of events. Meanwhile, family tensions mount for Nusrat and Danny.

A month has passed. A royal visit to the town turns nasty, and one character receives a visit from someone who seems to know more about what happened on the bridge.

A couple of months have passed. Will the police get to the bottom of what really happened on day one? And what does the future hold for baby Michael?