Now, RadioTimes.com has got an exclusive first-look clip from the third episode, giving us a glimpse at what is in store.
They are hoping the results from this test will tell them where the bomb was loaded onto the plane, and get them one step closer to finding out who the perpetrator behind the attack was.
You can watch the exclusive clip above right now.
"Representatives of the Scottish police head to Washington to collaborate with their FBI colleagues and share vital new evidence. Progress looks promising, but the CIA appears to be withholding crucial intelligence on a possible bomb maker."
The Bombing of Pan Am 103 Lockerbie drama tells stories which haven't been heard before, says bossCall the Midwife star cast as Mary Bennet in BBC's Pride and Prejudice spin-off
The series is based on the true story of the Lockerbie bombing, which took place in 1988 and left 270 people dead. It was the worst ever terror attack on British soil and the first major act of terrorism against US citizens.
Alongside Swindells, Adams, Curran and Marsan, the drama also stars Merritt Wever, whose character Kathryn Turman will be introduced in the third episode, as well as Peter Mullan, Nicholas Gleaves, Lauren Lyle and Phyllis Logan.
Check out more of our Drama coverage or visit our TV Guide and Streaming Guide to find out what's on. For more from the biggest stars in TV, listen to The Radio Times Podcast.
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