S1 • E1
An abortion doctor is executed by an American pro-life terrorist; Mary Kane. An informant reveals that this is just the tip of the iceberg as Mary has 20 more bombs and plans on using them.
S1 • E2
The team uncover connections between racist ring-leaders, politicians and mass killings of immigrants, and are forced to go undercover in order to investigate.
S1 • E3
Zoe is caught in the middle of a siege on the Turkish embassy, while Tessa is stunned and confused when she sees a man from her past.
S1 • E4
Ellie questions whether she can cope with dating a spy, and Zoe discovers Tessa is up to something. Meanwhile, Tom's mentor is working undercover at an anti-Bush rally when his methods start to appear dangerously unconventional.
S1 • E5
Disgraced MP Hampton Wilder's memoirs could create a scandal big enough to bring down the government.
S1 • E6
Patrick McCann, the leader of an Irish splinter group, walks into a safe house armed with a grenade, and demands to speak to someone at MI5 about some crucial information he has on a Middle-Eastern terrorist group called Asabiyah.
Harry Pearce
Malcolm Wynn-Jones
Ruth Evershed
Adam Carter
Jo Portman
Ros Myers
Colin Wells
Danny Hunter
Lucas North
Zafar Younis