Jim Worth was ready for a fresh start when moving from Liverpool, England to Little Big Bear in Canada – but wherever he goes, Jack Devlin isn’t that far behind him.

The recovering alcoholic thinks taking up a job as the quiet town’s police chief will provide him and his family a new life… but when that alcohol comes calling, Jack is ready to take over his entire personality.

But when a murder rocks the Rocky Mountain town, he needs Jack more than ever to get to the bottom of things, with adversaries hiding around every corner.

Here are the key characters in the series, and who plays them.

Played by: Tim Roth (Pulp Fiction, Reservoir Dogs)

Jim Worth is an ex-Metropolitan Police detective who has moved with his family to the Rocky Mountains to start a new life as a local police chief in an idyllic rural community.

He is a committed cop, a family man, a sober alcoholic. But give him a drink, and a darker side emerges – his former undercover persona, Jack Devlin, takes over. Jack is a hard drinking, badass, witty thug of a cop whose fearless, devious, violent and charismatic nature is both Jim’s champion and his destroyer.

As a consequence of letting down his family in the past, he’s racked with a guilt that takes him to Little Big Bear where they can start afresh, but even in a remote mountain town, his past finds a way to catch up with him. In the end, Jim’s greatest adversary is himself.

Played by: Genevieve O’Reilly (The Dry, Andor)

Angela is a powerful, generous, kind and loving woman. She’s also in love with an alcoholic. Back in London, she was in control of her own destiny. Then she met Jim. Or rather, Jack – because Jim was drinking. Back then he was ‘dangerously exciting’. He made most men look dull by comparison. Angela could never ‘own’ him. Nor did he want to own her. And that made them a hell of a couple.

But after their daughter Anna was born, Angela could no longer abide the self-destructive behaviour of Jim’s undercover handle, Jack Devlin.

With her support, by the time baby number two, Petey, was born, Jim had sobered up and was a new man. With a fresh start in Little Big Bear, her life is one where being a wife and mother comes first. And it irks her.

Played by: Abigail Lawrie (No Escape, Strike)

Anna hates it in Little Big Bear. She misses her friends in London and feels like she’s growing up in the “arse end of nowhere”. But once North Stream Oil starts polluting the river she lives by, she focuses her teenage disapproval on the industry.

As events unfold, a tragedy throws Anna into despair. Then along comes Whitey. Saviour. Mystery. Whitey surprises, protects and excites Anna. He fills the abyss. As truths are revealed, Anna becomes a force in her own right. A girl who becomes a woman and develops her ostensibly weak position into one of alarming and unpredictable strength.

Played by: Oliver Coopersmith (Dickensian, Intergalactic)

Whitey is a monster with an angel’s face. He is the immortal spirit of youth – with all its pride, ambition, selfishness, dishonesty, restlessness and discontent – incarnate in the sinuous body of a handsome killer.

He is consumed by revenge; proudly, defiantly and relentlessly improvising on the theme as he pursues his target: Jack Devlin. His mind is a storm of strategies and fantasies; his life a sleepless, nerve-racked and entirely ad-libbed attempt to compensate for his own gang’s incompetence.

As events unfold, he focuses his attention on what he believes is Jack’s Achilles heel, his family, only to uncover his own weakness when he develops a fierce emotional bond with Anna.

Played by: Christina Hendricks (Mad Men, Good Girls)

Mrs Elizabeth Bradshaw is brought in by North Stream Oil, as vice president of stakeholder relations, to pave the way for a smooth takeover of Little Big Bear. She is charismatic, steely, fiercely intelligent and radiant with the self-assurance of a powerful job to do and in a position she has longed for.

With mountain air in her lungs, glacial water in her veins and oil industry money in her bank account, she has enough breeding and education to lull you into a false sense of security and enough legal training to build a case for killing you.

Played by: Christopher Heyerdahl (Under the Banner of Heaven, Hell on Wheels)

Known to many as simply “The Quebecois”, Louis Gagnon is North Stream Oil’s Head of Security. An ex–Special Forces operative, he is an utterly efficient and ruthless individual. Gagnon is an old-school tough guy who has worked in the oil industry for two decades and is more than happy to be flexible about the rules if it helps him achieve his goal.

He is one of the few people who knows of Jim’s past and is proactive to halt his progress when he starts sniffing around the oil company’s activities. At the same time, he finds Mrs Bradshaw’s presence deeply uncomfortable and is loath to lose control over Little Big Bear to her.

Played by: Ian Puleston-Davies (Pennyworth, The Responder)

Frank was once a powerful, ambitious criminal, until an undercover cop destroyed his career.

Now he’s in Little Big Bear to fulfil a “family obligation” and help Whitey find Jim. He starts off as the de facto brains of the gang, but as events unfold it becomes abundantly clear he is out of his depth.

Played by: Stephen Walters (Slow Horses, The Night Caller)

Johnny is a walking tragedy. He might have made a good musician, but he’s a lousy criminal.

Brought in as part of Whitey’s crew to pay off his debts to Frank, his short fuse and lack of common sense comes to be seen as a liability, and it’s not long before he irritates the wrong people.

Played by: Tobi Bamtefa (Mayor of Kingstown, Feel Good)

Godswill is Whitey’s enforcer and is utterly loyal to him. If it wasn’t for him, Whitey would never have survived 10 years in a care home from hell. And if it wasn’t for Whitey, Godswill might never have got out.

Keeping words to a minimum, he uses his hulking frame to intimidate others into following Whitey’s commands.

Played by: Sarah Podemski

Denise is a First Nations police officer in Little Big Bear. Her father is the chief of the local reserve, who has never forgiven her for putting on a “white man’s uniform” and, as he sees it, betraying her heritage.

Denise is driven by truth and morality, committing to the police so she can address the injustices in her community. Even as a grief-stricken Jim deserts his duty as symbol of law and order in Little Big Bear, Denise is unwavering in her respect and admiration for him.

Played by: Ryan Kennedy (Hellcats, For All Mankind)

Constable Nick McGillen is a sixth-generation local boy. Although somewhat vain and self-important, he is diligent and committed to the cause but detests Jim for undermining him at any given opportunity and is intolerant of his failings.

Nick and Denise are having an ongoing secret affair that he seems to read more into than she does.