2. Episode 2

In the weeks following the bombing, the pressure to make progress is immense. The joint Scottish-FBI investigation closes in on its first suspect.

3. Episode 3

The Scottish police head to the US with new evidence and a potential breakthrough. But the CIA appears to be withholding crucial intelligence on a possible bomb-maker.

4. Episode 4

The Frankfurt luggage list and bomb-damaged clothing leads Scottish CID to a small clothes shop on the island of Malta. Was this the origin of the bomb?

5. Episode 5

While the joint Scottish and FBI investigation closes in on the identity of the 'mystery shopper', a CIA asset could hold the key to the identity of the Pan Am 103 bombers.

6. Episode 6

Over a decade after the Lockerbie bombing, following much debate and international negotiation, the accused finally stand trial.