Season 01
Season 02
Season 03
Season 04
Season 05
Season 06
Season 10
Due to a rail strike, the transportation of a load of nuclear waste has to be done by road. Zoe's task is to make sure that the transportation of nuclear waste reaches its destination safely. MI5 receives evidence that a discontented army officer is planning to lead the armed services in a mutiny. Tom is sent to investigate undercover but is convinced he is wasting his time. When Danny arrives to release Tom from the task, his cover is blown and it becomes clear that Major Curtis has attached explosives to the nuclear waste that is being transported by road. Written by R
All Episodes - S02
EPS01
As Republican nationals make several strikes in London, another bombing at a secret military installation catches the team's eye. Special Branch tracks the entry of a Ser ...
EPS02
An extremist mullah may be planning England's first suicide bombing. MI5's mole is discovered and tortured, leaving the team in need of someone who can get deep inside th ...
EPS04
Twenty billion in US aid has disappeared from Russia. Meanwhile, MI5 is called in to deal with the theft of a billion dollars from a well known bank - that also handles g ...
EPS10
Harry finds out that Tom and Christine Dale, a CIA officer, are having a relationship. Tom ignores Harry's demands to end his relationship with Christine. Tom learns that ...