Series 4

12 Eyl 2005 · 57 dk.

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.

13 Eyl 2005 · 59 dk.

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.

22 Eyl 2005 · 59 dk.

Far-right political party The British Way is threatening democracy so Adam and Fiona go undercover to infiltrate and destroy its campaign.

29 Eyl 2005 · 59 dk.

Adam infiltrates a truck carrying illegal immigrants across Europe in order to stop a would-be terrorist.

6 Eki 2005 · 58 dk.

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.

13 Eki 2005 · 58 dk.

MI5 suspect a terrorist is planning an attack from his prison cell. Guest stars Jimi Mistry.

20 Eki 2005 · 59 dk.

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.

27 Eki 2005 · 59 dk.

An old British traitor is called in to infiltrate a Russian firm suspected of stealing secrets from GCHQ.

3 Kas 2005 · 58 dk.

Harry upsets the CIA by stopping an extradition to the USA.

10 Kas 2005 · 59 dk.

A former officer is convinced that MI5 killed Princess Diana and is determined to force the team to prove it.