Line of Duty (2012– )
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The Probation 

Gates returns to rescue Arnott but leaves before Kate, her cover now blown, arrives to find evidence that a body had been stored at the warehouse. Arnott recalls that the chief torturer was... See full summary »


Douglas Mackinnon


Jed Mercurio


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Episode cast overview, first billed only:
Tomi May ... Miroslav
Gregory Piper ... Ryan
Martin Compston ... Arnott
Vicky McClure ... Fleming
Thomas O'Malley Thomas O'Malley ... IT Technician
Nigel Boyle ... DI Ian Buckells
Claire Keelan ... DS Leah Janson
Lennie James ... DCI Tony Gates
Fiona Boylan Fiona Boylan ... WPC Karen Larkin
Kate Ashfield ... Jools Gates
Adrian Dunbar ... Hastings
Craig Parkinson ... Cottan
Neil Morrissey ... Morton
Paul Higgins ... Hilton
Owen Teale ... CI Osborne


Gates returns to rescue Arnott but leaves before Kate, her cover now blown, arrives to find evidence that a body had been stored at the warehouse. Arnott recalls that the chief torturer was called Tommy and admits to Kate that Gates saved him. She believes he is weakening in his attitude to Gates, whom he goes to see in secret, confirming his view that Gates is innocent of all the murders. Convinced that Gates is in danger but can bring the killers to justice Arnott persuades Hastings to let Gates set up a meeting with Tommy, recorded on a wire. Arnott and Kate intend to meet up with them but before they can do so Gates abducts Tommy to force a confession before committing an extreme act in the line of duty. Written by don @ minifie-1

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Not Rated | See all certifications »






Release Date:

18 September 2012 (USA) See more »

Company Credits

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Technical Specs


Sound Mix:

Dolby Digital



Aspect Ratio:

1.78 : 1
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Did You Know?


Following the complaint of one viewer during season one, the media regulator Ofcom found the BBC had breached Rule 1.28 of the Code in 2012, specifically that there was a "serious lapse" in its duty of care for a 13-year-old actor, Gregory Piper (Ryan Pilkington), who had appeared in scenes which were "of a particularly violent nature and included sexually explicit language" by breaching broadcasting rules requiring that "due care must be taken over the physical and emotional welfare and the dignity of people under 18". In its full report, Ofcom cited the programme's failure to involve an independent expert, such as a child psychiatrist, to determine the actor's intellectual and emotional capacity to participate in the controversial scenes and that programme makers had not followed the best practice advice of the BBC's Editorial Policy Unit. However, the regulator found that there was no actual harm, distress or anxiety caused to the child actor. See more »


Gates' Jaguar has the registration OV11 HLZ in one shot and a few minutes later as he pulls on his driveway the reg is OY11 XBS. See more »

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User Reviews

British mystery/thriller writing at it's best!
23 July 2012 | by dawn-78See all my reviews

I am consistently amazed at the writing talents and the acting talents that come out of England. Jed Mercurio's creation of this suspenseful police drama is top notch. There are tons of twists and turns and just when you think the action is going one way, a new idea or situation is placed in front of us to ponder. The premise is that a young DS, who won't lie in court for his fellow police officers is ostracized and gets transferred to the anti-corruption unit. His new unit specifically investigates potentially corrupt cops and that's where D.C. Gates comes into the picture. A cat and mouse game starts between the seasoned and decorated D.C. Gates, played brilliantly by the under utilized actor in Lennie James and D.S. Arnott, played by Martin Compston (Ewin Brodie in Monach of the Glen) Within the story is another mystery that is going on and all roads eventually collide. I would love to compare this show with another and I cannot. It has the camera feeling of Law and Order (UK) so there is a gritty quality to it. The scenery is drab and gray and the police office and what they wear blends in. Its the acting and the writing that stands out. Adrian Dunbar is brilliant as usual as D.S. Arnott's boss, a man whose seen a lot more in his lifetime than any of us ever will. I am putting out to the Universe that there will be a Season 2.

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