Spooks - Season 4

When a devastating bomb explodes in Central London, causing multiple deaths, a terrorist group with a hatred for human life claim responsibility. With their leader facing extradition, the bombers announce thatcrippling attacks will be launched at ten hour intervals until he's released. Will the team be able to track down the perpetrators before they strike again?

As the hunt for the bomb maker intensifies, Adam races to save the life of one of his team. But with another bomb set to devastate London, he is forced to risk the life of an innocent young girl to avert disaster.

When a high-profile MP crosses the floor to join the British Way, a far right political party, MI5 must take extreme action to stop the group winning their first parliamentary seat.With racist attacksspiralling out of control, Adam goes undercover to destroy the organisation from within. But will he achieve his goal before his cover is blown and his life endangered?

MI5 discover that an Islamic terrorist is planning to enter the UK and launch an attack. Adam travels to Turkey to infiltrate the route, and seemingly persuades his target to work for MI5. But can they really trust their newest recruit, or is he actually more dangerous than ever before?

When a legendary ex-MI5 officer unexpectedly kills himself, Harry is immediately suspicious. It soon emerges that the death was staged, but as the team go on a desperate hunt for the killers, the search turns out to lead dangerously close to home.

When MI5 get information that a terror suspect is coordinating a major attack from his prison cell, they make a shock decision to release him. Harry hopes that he will lead them to the terrorist network behind the attack, but could his high-risk strategy end in disaster?

Adam and Fiona's marriage is tested to breaking point when she insists on going undercover on an operation that leads straight back into her troubled past. But when events spiral out of control, will the team be able to get her out of danger in time?

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?

With the world on the brink of war with Iran, the CIA are rounding up British Muslim citizens and illegally extraditing them. Harry makes a stand for their human rights and is sacked. Alone, he goes underground to try and clear his name.

A legendary ex-spy pays a visit to Thames House with a bomb and holds the team to ransom, demanding they produce evidence that proves the Security Services assassinated Diana, Princess of Wales.