Season 4 · Episode 5 — 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.
Season 4 episodes
E1When a devastating bomb explodes in central London, causing multiple deaths, a terrorist group with a hatred for human life claim responsib…
E2Zafar and Adam race against the clock to uncover the latest bomb. As a new ultimatum is issued and Tash mysteriously disapears, the team is…
E3Far-right political party The British Way is threatening democracy so Adam and Fiona go undercover to infiltrate and destroy its campaign.
E4Adam infiltrates a truck carrying illegal immigrants across Europe in order to stop a would-be terrorist.
E5A 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 s…
E6MI5 suspect a terrorist is planning an attack from his prison cell. Guest stars Jimi Mistry.
E7The Syrian foreign minister tries to establish subversive contacts with MI5 at the opening of a cultural centre in London. Fiona is despera…
E8An old British traitor is called in to infiltrate a Russian firm suspected of stealing secrets from GCHQ.
E9Harry upsets the CIA by stopping an extradition to the USA.
E10A former officer is convinced that MI5 killed Princess Diana and is determined to force the team to prove it.