In August 1978, Musa al-Sadr, the Lebanese Shia leader, vanished during a visit to Libya. It sent shock waves through the Middle East and politicians and journalists demanded answers from the Libyan leader, Muammar Gaddafi. Yet, as BBC journalist Moe Shreif reports, despite dozens of subsequent journalistic and governmental investigations and many conspiracy theories, no trace of Sadr has been discovered since that fateful day just over 47 years ago. This film by BBC Eye Investigations presents