6. Chasing Ghosts

Despite a global investigation Megrahi’s conviction, and the failed appeals that followed, remain tainted- for some- by doubt and conspiracy theory.

After almost four decades, a new Lockerbie trial. Abu Agila Masud is due to go on trial in August. He denies any involvement and says a video confession he made in 2011 was forced.

Will the new trial finally put an end to it all?

Myles Bonnar revisits relatives of the victims and investigators, as new evidence challenges long held beliefs.

Lockerbie is produced by Caitlin Smith

Additional production by Rob Wilson

Sound design by Eloise Whitmore

Story consultants are Innes Bowen, Jack Kibble White and Graham Russell

Fact checking by Faisal Qureshi

Research by Rachael O’Neill and Callum McCulloch-Nowlan

Original development by Sally Greig Lockwood

Executive Producer: Gillian Wheelan

BBC Scotland commissioners: Heather Kane Darling and Victoria Easton-Riley

For BBC Radio 4, the commissioning executive is Tracy Williams, and commissioning editor is Dan Clarke.

Music by Callan Marchetti