TVTV NewsITV“Haunting” drama The Staircase is almost ready to stream for free, four years after its initial debut.Hayley Anderson Screen Time TV Reporter16:30, 20 Jul 2026The Staircase is on its way with Colin Firth delivering a “masterclass in acting”.‌True crime drama The Staircase originally in 2022 on HBO and Sky Atlantic but now it will soon be ready to watch for free via ITV ’s streaming service ITVX.‌After his wife Kathleen’s body is found at the bottom of the stairs in their North Carolina home, fingers start pointing at her crime writer husband Michael Peterson.‌Here’s a full on guide of everything there is to know about The Staircase as the wait is almost over.The Staircase release dateThe Staircase will be released in just a matter of days on Saturday, July 25, on ITVX.‌All eight episodes of the true crime drama are going to be released in one go for fans to binge-watch over the weekend.Who stars opposite Colin Firth in The Staircase?While Bridget Jones and The King’s Speech star Colin Firth takes on the role of Michael Peterson, his deceased wife is brought to life by Muriel’s Wedding and Wayward star Toni Collette.Their youngest son Todd Peterson is played by The White Lotus star and Arnold Schwarzeneggar’s son Patrick Schwarzeneggar.‌Meanwhile, Michael’s adopted daughter Margaret Ratliff is played by Game of Thrones legend Sophie Turner and French star Juliet Binoche as the documentary filmmaker Sophie Brunet.Other cast members include Michael Stuhlbarg, Parker Posey, Dane DeHaan and Olivia DeJonge.‌What to expect from The Staircase?The Staircase revolves around the suspicious 2001 death of Kathleen Peter and the follow-up murder trial of her husband Michael Peterson.After Kathleen was found at the bottom of the stairs at their home in North Carolina, the prosecution argued Michael had pushed her on purpose while the defence claimed it was a tragic accident.The series is not only an adaptation of the 2004 French documentary of the same name but the crew itself is dramatised, showing how the filmmakers impacted Michael’s life.Article continues belowFamily dynamics are also pushed to their limits with biological and stepchildren forced to choose sides as some believe Michael is innocent while others harbour doubt.The Staircase premieres on Saturday, July 25, on ITVX.Choose Daily Mirror as a 'Preferred Source' on Google News for quick access to the news you value.‌ITVColin FirthToni ColletteSophie Turner