The CNN Original Series Lockerbie: The Bombing of Pan Am 103 tracks the mysterious circumstances behind the deadliest terror attack on the United States before 9/11 and how families are still searching for answers. The gripping series delves into the devastating terror attack that killed 270 people, including 190 Americans, and the complex web of theories that emerged during the global investigation that followed and the unprecedented trial that played out on the world stage. The four-part series will premiere with two episodes on Sunday, February 16 at 9pm ET/PT and the following two episodes will air on Sunday, February 23 at 9pm ET/PT on CNN.