True crime drama The Staircase starring Colin Firth and Toni Collette. If you followed the Netflix documentary series with the same title exploring the murder\/mystery death of Kathleen Peterson - wife, mother, respected community figure - you'll know how complex the case is going to be. Based on a true story, The Staircase further explores the life of Michael Peterson, his sprawling North Carolina family, and the suspicious death of his wife, Kathleen. Colin Firth plays novelist, Michael, and Toni Collette his soon to be tumbling down stairs and head-bashing wife, Kathleen. Suspicion, intrigue, the discovery of past case with striking similarities and truth are all explored as the family seeks answers and to the question of how Kathleen met her end. An all-star cast including Michael Stuhlbarg (Your Honor), Juliette Binoche (Chocolat), Dane DeHaan (ZeroZeroZero), Sophie Turner (Game of Thrones), Vincent Vermignon (Romy and Michele's High School Reunion), Odessa Young (Shirley) and Parker Posey (Lost in Space), help make this a gripping and twisty drama. https:\/\/www.youtube.com\/watch?vr1w6TkW8BIw&ab_channelSkyTV The Staircase - Thursday at 9.00pm on Sky Atlantic and Now.