Drama series about the British Security Service. Eco-terrorists plan to flood London unless documents are published which reveal the government's environmental policy is a sham.

Drama series about the British Security Service. When the United Kingdom hosts the World Trade Summit for Africa, the team are posted undercover, right at the heart of the talks.

Drama series about the British Security Service. The government releases its report on the Cotterdam Seven - terror suspects killed in a prison fire. Harry senses a whitewash.

Drama series about the British Security Service. With their attempt on the Home Secretary's life foiled, the coup plotters decide to up the stakes in their battle with MI5.

As the team fear reprisals against Iran, a British plane is apparently hijacked and flown into a US air base. But after a visit to the base, an international cover-up is revealed. Show more

MI5 discover that an Islamic terrorist is planning to enter the UK and launch an attack. Adam infiltrates the route, and seems to persuade him to work for MI5. Show more

The team investigate a multi-millionaire Soviet investor who the government see as the saviour of the NHS. But is his offer of financial intervention too good to be true?

A car bomb kills the Northern Ireland Secretary and his two daughters. Soon after a British army base is attacked. Could this be the start of a revenge campaign by terrorists? Show more

A scientist is rumoured to be negotiating with terrorists who want to buy his potentially deadly research. Show more

Zoe is caught up in the deadly fallout of an abortive mission and must stand trial for conspiracy to murder. Can an MI5 officer be culpable for the death of an undercover officer? Show more

MI5's central computer is being hacked and the number one candidate is school teacher, Gordon Blaney. Show more

When $2 billion is stolen from the last British family-owned bank in London, MI5 is tasked by the government to track down the thief - and the money. Show more

When the President of the United States makes an unscheduled trip to the UK, it's a huge and complex operation. Show more

The French Intelligence Service wants to work with MI5 to catch an arms expert they suspect of trying to sell Eurofighter technology. Show more

Harry reawakens sleeper agent Fred Roberts, a renowned chemist and family man. Show more

Danny and the team must uncover the truth behind an assassination attempt on a famous novelist. Was he the real target? And who is the enemy?

The latest round of Middle East peace talks are abruptly halted when a key delegate is killed. Show more

Suspicions are aroused when a known mercenary, recently linked to a new player on the arms smuggling circuit, is seen visiting an old Soviet arms dump. Show more

Danny and Fiona investigate a house they suspect is being used by North African terrorists. While the agents are installing a listening device, terrorists take them hostage. Show more

Tom is informed of 20 bombs that have gone astray in Liverpool. Minutes later a car bomb kills a family-planning doctor and their daughter. Show more