Series 4

12 сент. 2005 г. · 57 мин

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 сент. 2005 г. · 59 мин

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 сент. 2005 г. · 59 мин

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

29 сент. 2005 г. · 59 мин

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

6 окт. 2005 г. · 58 мин

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 окт. 2005 г. · 58 мин

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

20 окт. 2005 г. · 59 мин

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 окт. 2005 г. · 59 мин

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

3 нояб. 2005 г. · 58 мин

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

10 нояб. 2005 г. · 59 мин

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