Seasons & Episodes
Thou Shalt Not Kill
An abortion doctor is executed by an American pro-life terrorist; Mary Kane. An informant reveals that this is just the
Looking After Our Own
Tom and Helen must go undercover and befriend the wife of a suspected hardcore racist in order to prevent a racewar. Mea
One Last Dance
Whilst on a routine check of the bugs in the Turkish Embassy, Zoe and all the other people in the embassy are taken host
Traitor's Gate
MI5's best officer, Peter Salter, seems to be joining the enemy. President Bush is scheduled to visit and it seems as th
The Rose Bed Memoirs
Disgraced MP Hampton Wilder has written memoirs with the power to destroy the government, what's more an old KGB agent i
The Lesser of Two Evils
Patrick McCann, an IRA leader claims to have information about a nuclear attack on the UK mainland, can MI5 trust the IR
Legitimate Targets
With Tom's family trapped in his house with a bomb, and nothing Tom or the other spooks can do but watch on. There is a
Nest of Angels
A fellow agent informs Tom that young boys and men from a mosque in Birmingham are being trained as suicide bombers. The
Spiders
MI5's mainframe has been hacked into. But Tom and his team think they have found a lead in the form of an I.T. teacher,
Blood and Money
After stealing a large amount of money from a bank, a man is found crucified on the moors. The Treasury call in the team
I Spy Apocalypse
Tom's skills as leader are tested to their extremes when they take part in an Extreme Emergency Response Initiative Exer
Without Incident
The president of the USA makes an unexpected stop in London. Tom and his team are forced to work with the CIA. A power s
Clean Skin
A French scientist has gone renegade and taken a top secret weapon called Firestorm with him, which he is threatening to
Strike Force
A new series of strikes prompted by the unions has the team worried. And when news of a 'strike' by the army arise, Tom
The Seventh Division
Tom is undercover with Customs, but when he goes off to phone in, the rest of the crew are murdered. A Colombian drugs c
Smoke and Mirrors
Tom ignores Harry's demands to end his relationship with CIA officer Christine Dale. Christine hands Tom a secure commun
Project Friendly Fire
Tom Quinn has disappeared after shooting his boss Harry Pearce. He also stands accused of assassinating the Chief of Def
The Sleeper
Harry reawakens sleeper agent Fred Roberts, a renowned chemist and family man. As Fred becomes more deeply involved with
Who Guards the Guards?
Danny and the team must uncover the truth behind an assassination attempt on a famous novelist.
A Prayer for My Daughter
The latest round of Middle East peace talks are abruptly halted when a key delegate is killed. With the peace process de
Love and Death
Saturday morning. Danny and Colin practice their firing technique on MI5's gun range. Zoe and her fiancé Will are still
Persephone
Zoe is tried for manslaughter when an MI5 operation results in the murder of an undercover police officer.
Outsiders
While a deadly hacker turns Britain upside down, Danny decides whether to reveal all to Will, MI5 hunts the source down
Celebrity
The baby of a celebrity couple is kidnapped and they call in MI5. Fiona goes in undercover to gather more information ab
Frequently Asked Questions
When known mercenary Robert Morgan is spotted at a top-secret disused Soviet arms dump, he obviously has to be brought i
The Suffering of Strangers
It's Fiona's birthday, and she's not going to forget it! While inspecting a possible Islamic terrorist safe house, they
The Special (1)
When a devastating bomb explodes in central London, causing multiple deaths, a terrorist group with a hatred for human l
The Special (2)
Zafar and Adam race against the clock to uncover the latest bomb. As a new ultimatum is issued and Tash mysteriously dis
Divided They Fall
Far-right political party The British Way is threatening democracy so Adam and Fiona go undercover to infiltrate and des
Road Trip
Adam infiltrates a truck carrying illegal immigrants across Europe in order to stop a would-be terrorist.
The Book
A neo-conservative group murder an ex-minister to cover up his past and then they hunt down the journalist who is threat
The Innocent
MI5 suspect a terrorist is planning an attack from his prison cell. Guest stars Jimi Mistry.
Syria
The Syrian foreign minister tries to establish subversive contacts with MI5 at the opening of a cultural centre in Londo
The Russian
An old British traitor is called in to infiltrate a Russian firm suspected of stealing secrets from GCHQ.
The Sting
Harry upsets the CIA by stopping an extradition to the USA.
Diana
A former officer is convinced that MI5 killed Princess Diana and is determined to force the team to prove it.
Gas and Oil (Part 1)
The government introduces Draconian emergency measures in response to a series of terrorist attacks. MI5 fears that infl
Gas and Oil (Part 2)
MI5 has foiled an attempt to murder the Home Secretary, but the plotters use the new emergency powers to imprison Harry.
The Cell
Zaf goes deep undercover to infiltrate an Al-Qaeda cell that is planning an attack on the UK. When Adam learns that the
World Trade
Posted undercover at the World Trade Summit for Africa, the team discovers an assassination plot. Initially determined t
The Message
The government publishes its report on the investigation into the death of seven terrorist suspects in a fire at a priso
Hostage Takers (Part 1)
Adam and Zaf try to find a group of terrorists who have infiltrated Britain. Ros oversees a visit by a delegation of Sau
Hostage Takers (Part 2)
The terrorists start to execute hostages in pursuit of their demand for the release of Al-Qaeda prisoners held in Saudi
Agenda
MI5 investigates the assassination of a Muslim cleric outside the high court, and uncovers a radicalised Christian who i
The Criminal
MI5 is put in charge of protecting Niko Grecic, the former right-hand of Tezlia, a Serbian who is put on trial for war c
Aftermath
An environmental terrorist group is threatening to flood London if the government does not make a secret document public
The Virus: Part 1
Zaf and Adam participate in a mission in Tehran that goes wrong. As the investigation advances, the team realizes they'v
The Virus: Part 2
The country faces a plague outbreak. In a race against time, the officers from Section D have to track down and quaranti
The Kidnap
A British plane is thought to have been hijacked and taken to an American airstrip. Ros is captured by the Yalta organis
The Extremist
As an Algerian extremist escapes his home detention, the team fears he may be plotting a terror attack on US businesses
The Deal
MI5 has to intercept a Russian arms dealer who plans to pass blueprints for a nuclear device to Iran. Adam and Ana decid
The Courier
Harry discovers there's a mole at large in the Grid. Meanwhile, Ros and Adam board a plane undercover in an attempt to s
The Broadcast
A live TV broadcast announcing the new peace accord between the UK, US and Iran is hijacked by armed gunmen. Can Adam an
Infiltration
Ros is in grave danger after Bob Hogan discovers she's a traitor. Meanwhile, Harry's brought before Yalta's chief, whose
Isolated
The team finds themselves suspended from the Grid following what happened involving Ros. Harry learns from an old advers
The School
Hardliners opposed to the peace between Iran and the West have targeted a London school. Jo is captured by Redbacks, the
New Allegiances
The team steps in when a British soldier is kidnapped by Al-Qaeda. Meanwhile, an old protégé of Harry's returns to the
Split Loyalties
Harry vows revenge by taking down the head of Russia's intelligence service in Britain with the help of Lucas North. Luc
The Tip-Off
With Lucas back within MI5 he reveals that the Russians interrogated him about Operation Sugar Horse, the most secret on
A Chance for Peace
The team is stunned to discover that Al-Qaeda's number three wants to negotiate. It's a risk, but Harry and the team hav
On the Brink
The British economy is on the brink of collapse and if one more bank goes down the entire financial system will implode.
Accidental Discovery
A teenage boy accidentally stumbles upon a government conspiracy and is instantly absorbed into the world of MI5, ending
The Mole
Harry is imprisoned and accused by MI5 of being the Russian mole. Lucas disappears to Moscow in a bid to gather intellig
Nuclear Strike
With the Russians launching a nuclear strike on London, the only person who can help the team in this desperate hour is
Uranium
Harry is still missing, and there is one question on everyone's mind: is he dead, or alive? Section D discovers that Ha
Energy
The country reaches crisis point when energy supplies are threatened by an explosion at a gas processing plant. With res
Tycoons
The pressure is on for Section D when a secret meeting of powerful tycoons is stormed by armed terrorists and eight of t
Nemesis
Lucas's past comes back to haunt him when his former torturer Darshavin turns up with intelligence about a bomb in Londo
Sudden Death
Harry is puzzled by the sudden death of CIA boss Samuel Walker. Harry is convinced that he did not commit suicide and wh
Bankruptcy
With the country on the verge of bankruptcy, the government can't pay its national debt payments. Section D is asked to
Start a War
After a Pakistani intelligence officer is murdered in South London, the head of the Pakistani intelligence service talks
Brink of War
With India and Pakistan on the brink of war, emergency talks are set up in an exclusive London hotel. Section D faces it
Plymouth
Reeling after the explosion at the hotel, Section D is left considering the sacrifices they make as spies. But they are
Oil Baron
The pressure is on for Beth when she goes undercover for MI5 for the first time. She is tasked with protecting an influe
Paroxocybin
Section D is forced to welcome an FSB officer onto the Grid to help track down Aibek, a rogue nationalist from the ex-So
Chinese Prize
When a highly skilled trio of Chinese agents arrive in London for 48 hours only, the team must find out why they are her
Hotel Lockdown
The American president is on his way to London to chair top secret peace talks between Israel and Palestine, under the g
Cybershell
Relations between the CIA and MI5 are stretched after an American drone is hacked in Afghanistan whilst in British care,
Dead Drop
Lucas is plunged further into the depths of his past when Vaughn takes his manipulations to a new level. Ruth is approa
Cat and Mouse
The team faces their toughest challenge ever: tracking down Lucas North, their Section Chief, friend and one of the best
Garden Leave
The team has been left shocked by Lucas's betrayal, and with Harry Pearce on gardening leave, Section D has a new leader
Stolen Laptop
Calum is attacked by a gang of street muggers during a routine intelligence-sharing exercise with MI6. The laptop he was
Dirty Bomb
MI5 receives a red flash: radioactive material has been detected at an airport. They have intelligence that a highly dan
Suicide Bomber
Two former inmates are released from jail. One is an undercover MI5 asset and the other is an impressionable wannabe sui
Kidnap
There is new evidence of CIA agent Jim Coaver's involvement in some recent attacks on MI5. Harry ends up kidnapping his
Deportation
Harry finds himself facing deportation to America following the death of CIA agent Jim Coaver. After some new evidence c
