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A team of agents in the British security intelligence service work to protect the UK from terrorists and other threats to national security. Harry Pearce, head of MI-5's counterterrorism section based in the highly secure suite of offices called The Grid, oversees them and deals with the often dirty politics of the spy game.
The second series of the adrenalin-charged spy drama in which our heroes can die at any time. A Bosnian war criminal flies into Britain after an attack on a British army base.
Episode 1. MI5 investigate after a bomb kills the Northern Ireland Secretary and his two daughters.
Peter Firth stars in the high-octane, controversial spy drama. An MI5 undercover agent is tortured when he discovers that a Birmingham mosque is training suicide bombers.
Keeley Hawes stars in the suspenseful spy drama series. A hacker gains access to MI5's central computer, and the prime suspect is a teacher with links to the radical left.
The ultra-tense spy drama series about the modern British Security Service. When a billion dollars is stolen from a London trading bank, Danny goes undercover.
Edge-of-the-seat drama about the Security Service. The team take part in an exercise testing their response to a national emergency. But is it really just an exercise?
Second series of the compelling espionage drama. When MI5 are forced to work with the CIA and the White House security team, the 'special relationship' becomes a tad strained.
Keeley Hawes stars in the supremely suspenseful spy drama. The French want to work with MI5 to catch an arms expert they suspect of selling Eurofighter technology.
Acclaimed spy drama with Matthew Macfadyen. MI5 is monitoring a resurgence of trade union militancy which threatens widespread disruption in the public sector.
Keeley Hawes stars in the tense drama series about the British Security Service. MI5 come up against oil corruption and the Chala Cartel, Colombia's biggest drug traffickers.
Keeley Hawes stars in the super-suspenseful action drama about the UK's Security Service. Danny and Zoe are forced to spy on Tom as a US assassin is dispatched to Britain.