Is anyone in UK watching this? I caught up with it after i returned from hols and it has me gripped and there was a huge twist on the plot on Monday which totally made me change my mind and I cant wait to see how it ends? Anyone else a fan, its really well acted and a great script. the 2 main leads are great in their roles from Wiki Liar is a six-part thriller miniseries created by brothers Harry and Jack Williams, and co-produced by SundanceTV and ITV. The series stars Joanne Froggatt and Ioan Gruffudd, and débuted on ITV on 11 September 2017. Cast and characters Joanne Froggatt as Laura Nielson, a smart and dedicated teacher who is newly single. Ioan Gruffudd as Andrew Earlham, a renowned surgeon whose son, Luke, is a pupil at Laura's school. Zoe Tapper as Katy Sutcliffe, Laura's older sister who works alongside Andrew at the local hospital. Warren Brown as PC Tom Bailey, Laura's ex-boyfriend who is having an affair with her sister, Katy. Richie Campbell as Liam Sutcliffe, Katy's unsuspecting husband and father of her two children. Jamie Flatters as Luke Earlham, Andrew's son who is a pupil in Laura's class. Shelley Conn as DI Vanessa Harmon, a Thanet & Dover Police detective who investigates Laura's allegation of rape. Danny Webb as DS Rory Maxwell, a Thanet & Dover Police detective and second in command to Vanessa Harmon.