“It's a fine line between safety and terror. Meet the rulers.”
Tense drama series about the different challenges faced by the British Security Service as they work against the clock to safeguard the nation. The title is a popular colloquialism for spies, and the series follows the work of a group of MI5 officers based at the service's Thames House headquarters, in a highly secure suite of offices known as The Grid.
10 seasons · 86 episodes
In the tenth and final series, secrets tumble out when former foes of Harry Pearce during the Cold War fly into London to negotiate a partnership between Russia and the UK.
S10 E1Garden Leave
Sep 18, 2011
The team has been left shocked by Lucas's betrayal, and with Harry Pearce on gardening leave, Section D has a new leader called Erin Watts. She has brought Calum Reed with her into the team. Harry Pearce manages to win his MI5 employment tr
S10 E2Stolen Laptop
Sep 25, 2011
Calum is attacked by a gang of street muggers during a routine intelligence-sharing exercise with MI6. The laptop he was carrying is stolen, and contains highly-classified information on MI5's undercover assets. Their names are soon plaster
S10 E3Dirty Bomb
Oct 2, 2011
MI5 receives a red flash: radioactive material has been detected at an airport. They have intelligence that a highly dangerous anarchist with a penchant for dirty bombs has secretly entered the country. They enlist Dimitri to honeytrap the
S10 E4Suicide Bomber
Oct 9, 2011
Two former inmates are released from jail. One is an undercover MI5 asset and the other is an impressionable wannabe suicide bomber who has been radicalised in prison. They are set to launch an attack somewhere in London, but our team must
S10 E5Kidnap
Oct 16, 2011
There is new evidence of CIA agent Jim Coaver's involvement in some recent attacks on MI5. Harry ends up kidnapping his former Cold War colleague but soon ends up realising that he's been looking in the wrong place and Jim could be innocent
S10 E6Deportation
Oct 23, 2011
Harry finds himself facing deportation to America following the death of CIA agent Jim Coaver. After some new evidence comes to light about the recent attacks on the United Kingdom and the government's proposed alliance with Russia, Ruth an
Peter Firth
Harry Pearce
Hugh Simon
Malcolm Wynn-Jones
Nicola Walker
Ruth Evershed
Rupert Penry-Jones
Adam Carter
Miranda Raison
Jo Portman
Hermione Norris
Ros Myers
Rory MacGregor
Colin Wells
David Oyelowo
Danny Hunter
Richard Armitage
Lucas North
Keeley Hawes
Zoe Reynolds
Raza Jaffrey
Zafar Younis
Shauna Macdonald
Sam Buxton
