Explosive Evidence - S1.E5

In 1985, an Air India flight vanishes off the coast of Ireland. The rescue mission discovers that the crew had no warning before the jet was ripped apart. Investigators are alerted to a bag checked in without the passenger boarding. Another explosion on the same day at Tokyos Airport is soon linked to this incident. The bomb builder is traced and sent to jail but the person who checked the bag onto the plane has never been caught.