A thorny, timely drama about assumed guilt in the age of social media, this four-parter stars Kelly Macdonald as a nurse whose nine-year-old son was murdered by a teenage boy 15 years before, and who is now on trial for prompting a brutal attack on the man she believes was responsible. But does she have the right man? And who is really in the dock?
Monday 8 to Thursday 11 April, 9pm, BBC One
Related: What's on Netflix and Amazon this month – April 2019