Series 4
Episodes
S4 · E1 · 12 Sept 2005 · 57 min
The Special (1)
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 that crippling attacks will be launched at ten hour intervals until he is released.
S4 · E2 · 13 Sept 2005 · 59 min
The Special (2)
Zafar and Adam race against the clock to uncover the latest bomb. As a new ultimatum is issued and Tash mysteriously disapears, the team is forced to deal with the possibility of a mole within their own organisation.
S4 · E3 · 22 Sept 2005 · 59 min
Divided They Fall
Far-right political party The British Way is threatening democracy so Adam and Fiona go undercover to infiltrate and destroy its campaign.
S4 · E4 · 29 Sept 2005 · 59 min
Road Trip
Adam infiltrates a truck carrying illegal immigrants across Europe in order to stop a would-be terrorist.
S4 · E5 · 6 Oct 2005 · 58 min
The Book
A neo-conservative group murder an ex-minister to cover up his past and then they hunt down the journalist who is threatening to blow the story and is under MI5 protection.
S4 · E6 · 13 Oct 2005 · 58 min
The Innocent
MI5 suspect a terrorist is planning an attack from his prison cell. Guest stars Jimi Mistry.
S4 · E7 · 20 Oct 2005 · 59 min
Syria
The Syrian foreign minister tries to establish subversive contacts with MI5 at the opening of a cultural centre in London. Fiona is desperate to lead this mission and must confront her Syrian past.
S4 · E8 · 27 Oct 2005 · 59 min
The Russian
An old British traitor is called in to infiltrate a Russian firm suspected of stealing secrets from GCHQ.
S4 · E9 · 3 Nov 2005 · 58 min
The Sting
Harry upsets the CIA by stopping an extradition to the USA.
S4 · E10 · 10 Nov 2005 · 59 min
Diana
A former officer is convinced that MI5 killed Princess Diana and is determined to force the team to prove it.
Data and images from TMDB.