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A mysterious marksman sharpens up his sniper skills on a flock of unsuspecting sheep, before heading for Aidensfield and murdering Liz's ex-boyfriend, a newly arrived doctor

The Aidensfield residents are up in arms over noisy lorries rumbling through the village on their way to a local quarry. David spends a night in the cells after joining the protest

Steve Crane's wayward mother Babs arrives in Aidensfield, having fallen out with her boyfriend, and causes all manner of chaos when she puts her self-defence skills into practice

A man receives letters threatening to kidnap his son, but the case is dismissed by Scotland Yard - prompting Poirot to open his own investigation

A restaurant customer's abrupt change of diet intrigues Poirot, whose investigation leads him to murder and an ill-gotten inheritance. David Suchet stars

In a flashforward episode, a jittery Betsy is quizzed by the police about finding a dead body, and there are five potential victims

Ronnie foils Carl's arson plot, Sam keeps tabs on Megan's flat, Bernie takes out her bad mood on Jodie, and Debbie confides in Lou about her condition

Kevin and Ronnie challenge Debbie over Carl's claim that he's her son, Megan and Will discuss their Sam problem, and Hope tries to worm her way into Rita's good books

Will and Sam attempt to keep each other onside, Carl reports Ronnie for assault, Brian refuses to reinstate Lily, and Tim gets jealous of Ben and Steve's blossoming friendship

Sam checks his phone for evidence of Megan and Will's affair, Debbie vows to make amends to Carl, and Jodie stirs up trouble at The Kabin

Paul meets a shy rottweiler that is struggling to bond with people, before falling head over heels for a spaniel cross puppy with a bad case of mites

The detective investigates the disappearance of a Dutch au pair and discovers a connection to an earlier unsolved case as conflict erupts between his fellow officers

The presenter explores the secrets of the relatively undiscovered Le Marche region, before heading to the capital Rome and a rendezvous with a former boyfriend

The comedian concludes his trip, heading south through the White Pass toward Vancouver Island, hunting for moose and riding with cowboys

Dave Myers and Si King embark on a journey along the famous American road, learning about Chicago's meatpacking industry and cooking with the Amish community

Davina McCall and Nicky Campbell tell the story of a woman trying to fulfil her mother's dying wish of reuniting her brother with his birth family

Suzie takes drastic action when a breakthrough suggests an inside job and Clive and DI Ray enact their risky plan to expose corruption

Beth turns to her husband's best friend Adam for help as she grapples with a new revelation, while the police connect Tom to more murder victims

Alarm bells ring for Dawson when Pete asks her to meet his mother, and more drama awaits when her brother Antonio needs a fake alibi. Meanwhile, Clarice's due date arrives

Demelza refuses to speak to Ross, assuming that he will abandon her and return to Elizabeth. At Sir Hugh Bodregun's ball, she turns to Captain McNeil for support

The barrister examines more real-life cases, beginning with deaths of six children in a house fire in Derby and the murder of a 67-year-old woman in south Wales