1 :01x01 - Episode 1

Charlie Green's first mission with Field Office 19 is to foil an apparent assassination plot against the British prime minister. Charlie finds himself in uncharted territory when he unwittingly becomes team leader and is given five and half hours to track down the would-be killer.

2 :01x02 - Episode 2

Protestors hack into Emergency Communications System and broadcast a video of dead inmates at a government prison. MI5 publicly deny the footage is real, prompting the terrorists to set off a series of false alerts. Jez realises he's partly responsible for the chaos but does he have the power to stop the extremists before it is too late? Charlie discovers MI5 corruption directly relating to the London bombing.

3 :01x03 - Episode 3

Jez and Kylie are sent in undercover to investigate a housing estate which has become a criminal hot-spot and source of fake radiation drugs. The killing of a police officer on the estate complicates matters, putting the pair in grave danger. Charlie and Rachel discover further clues in the investigation of Hannah's death and MI5 corruption.

4 :01x04 - Episode 4

5 :01x05 - Episode 5

6 :01x06 - Episode 6