Spotlight

A case of suspected police corruption that turned into real-life Line of Duty. Mandy McAuley investigates what started as an investigation into police car contracts worth millions of pounds. After the case collapsed, failings were exposed in the way officers were conducting secret surveillance on other officers – including failings that the police service has never made public.

Conor Spackman hears chilling testimony from relatives of those slain in a spate of gun murders in north and west Belfast over the past five years. He examines links between the killings and investigates a shadowy dissident republican group claiming to be on ceasefire.

Freddie Scappaticci led a double life – spyhunter for the IRA and, at the same time, one of Britain's most important spies inside the group. His ability to interrogate IRA gunmen and bombers gave him unique access to their secrets – information that could be fed straight back to their enemies. But his IRA role also meant he was a killer. Jennifer O'Leary investigates.

The criminal justice system in Northern Ireland is burdened by long delays in cases getting to court. Murder and rape cases can take five years or longer to conclude. Reporter Stephen Dempster investigates why cases are taking so long, talks to victims who have found themselves in what they call a 'traumatic, nightmare situation', and hears from experts who fear the system is at breaking point, with potential consequences for the rule of law.