The Guilty is set across two timelines \u2013 2008 and present day \u2013 and tells the story of DC Maggie Brand (Tamsin Greig - Episodes, Friday Night Dinner), who investigates the disappearance of little Callum Reid whilst coping with her own young son\u2019s diagnosis with autism. Principally known for her roles in two Channel 4 television comedies: Fran Katzenjammer in Black Books and Dr. Caroline Todd in Green Wing. Greig currently stars as Beverly Lincoln in transatlantic sitcom Episodes, and as Jackie in the Channel 4 sitcom Friday Night Dinner and takes the lead in ITV's The Guilty Who is DCI Maggie Brand? Maggie\u2019s very good at her job: she\u2019s very contained, has a great eye for detail and doesn\u2019t suffer fools gladly. I\u2019ve met a couple of DCIs as research and the thing they are very interested in now is \u2018emotional intelligence\u2019. Maggie has that but she also has a very interesting emotional detachment, so she has emotional intelligence which is buried. She\u2019s not interested in making people feel at ease - she\u2019s just interested in what the truth is and I think that\u2019s very unsettling for the people she works with. She\u2019s not instantly likeable but she\u2019s respected and knows how to do her job well, regardless of what\u2019s expected of her. How does Maggie \u2013 the mother of a four year old boy - detach herself from the case emotionally? I think Maggie is the sort of person who is emotionally guarded in any situation. The director asked me at the readthrough \u2018do you think she behaves differently at work and home?\u2019 and I think the levels of change are minute. You know you meet those people...you like them, but they don\u2019t give anything away. Wherever they are, at work or at home, you\u2019re always looking to see what their vulnerability is. But they don\u2019t ever give it away. Interestingly, Debbie has written in the character of Maggie\u2019s mother, who is very emotional, very flamboyant, who impedes on other people\u2019s emotional garden \u2013 she gets over the wall when she\u2019s not invited! How does the Reid case and the relationships at the heart of The Guilty unravel? One of the DCIs I spoke to said \u2018go by the ABC rule \u2013 A. accept nothing. B believe nobody. C. check everything. So you look at everybody and say \u2018really?\u2019 I think Maggie is taking her time to look at everyone from all angles - as a parent, a partner, a suspect - and see what happens. She doesn\u2019t show her working. She wouldn\u2019t get a GSCE in maths! What\u2019s really beautiful about this story is that it allows the space for truth to be revealed, rather than hunting it out. With Daniel and Claire, the truth is allowed to rise just very slowly to the surface. And that\u2019s what\u2019s happening with Maggie and her husband Jeb too. They just allow the truth of what\u2019s before their eyes to take its natural shape. Do you think you\u2019d make a good detective? My brother in law is a policemen and I\u2019ve always been very interested in how he does his job. He talks in a very interesting way about how you interview someone. And it\u2019s a bit like being an actor because you have to get into their shoes. There is a necessity for shelving judgement and shutting down your own emotional horror to be able to say to a suspect \u2018I get you. I see how that was possible.\u2019 You sympathise with their stories in order to get the last question in which might lead to a confession. To get them to that place where you say \u2018I don\u2019t judge you \u2013 I\u2019m just trying to see how you got here\u2019. I think that\u2019s really intriguing. Your best work is when you have no angle or agenda. What have you enjoyed most about playing Maggie and do you ever take the dark subject matter home? I remember a director at the RSC once said to me \u2018An actor has to decide whether they are trying to express emotion or deal with emotion\u2019. And I think that\u2019s what\u2019s really exciting about playing this part. She feels all of this but its how she deals with it. That makes for really interesting telly because you\u2019re not shown everything. Its like watching someone fill out a sudoku and thinking \u2018how on earth do you know that number goes there!?\u201d I have to remember this is a character \u2013 it\u2019s not me. When I get in the car to work I\u2019m getting into Maggie and when I get out it\u2019s not me anymore. I asked the DCIs I met \u2018how do you cut off? How do you leave work at work?\u2019 and they both said \u2018you don\u2019t.\u2019 It\u2019s in the room but you can choose not to engage with it. Then it doesn\u2019t impact on the real relationships you\u2019re having. Having said that, I\u2019m very grateful that when I go home and look at my children, I can say \u2018you\u2019re here\u2019.