Worlds Collide: The Manchester Bombing

First of a two-part documentary examining the events surrounding the Manchester Arena bombing on May 22, 2017, when a terrorist detonated a suicide bomb at an Ariana Grande concert, killing 22 people and injuring more than 800 others. The opening edition begins with a countdown of the hours leading up to the bombing, as well as rewinding back to the childhoods of the brothers who planned and carried out the attack and those of their victims, contrasting their respective upbringings.

Part two of two. Cameras chart the final minutes in the run-up to the 2017 detonation at Manchester Arena and in the aftermath, the emergency services' response. A mock terrorist attack run one year before the bombing was designed to discover any shortcomings. But on the night of the explosion, the national police response to terrorism, codenamed Operation Plato, failed to achieve its aims and the emergency services response was delayed.