It is almost exactly 30 years since the BBC's Rough Justice team began investigating miscarriages of justice. The programme can claim to have achieved the overturning of the convictions of 18 people in 13 separate cases, continuing sporadically for over 25 years until it was finally axed in November 2007. Timeshift looks at the creation of this extraordinary series and reveals what a shock to the system it was. Featuring contributions from many of those involved, it asks how it was that a television programme took it upon itself to question one of the oldest judicial systems in the world.