The fifth season of Spooks aired its first episode in two parts, the first appearing on 17 September 2006. In it, elements within the British Government, MI6 and the UK press conspire in an attempt to overthrow the Parliament and the Prime Minister. These elements agree that for Britain to survive the threats posed by modern day terrorism, democracy had to be replaced with rule by committee. These episodes introduced Ros Myers (Hermione Norris).
This season’ subsequent storylines include a fake home-grown Al-Qaeda cell that plans an attack on London; the British government selling nuclear technology to Saudi Arabia; and the US administration selling arms to African dictators. The ratings for this season remained consistent with those of the previous season, averaging 6 million viewers.