Blake was seen again at the beginning of Series 6 when he covertly ordered the Tehran train bomb, however, he was acting on false intelligence provided by Bob Hogan.
Blake reappears in Series 7, Episode 3 when Section D are tracking an active Al-Qaeda cell that is planning an attack on crowded places in London, mostly markets.
Blake at first refuses to raise the national threat level, stating that the British public need good news due to the housing and financial crisis.
Blake is last seen in the House of Commons again, thanking MI5 for stopping the attacks with no civilian casualties, albeit two SO19 officers being killed.
He is last seen in that Episode watching the TV as a House of Commons restaurant is destroyed by Al-Qaeda, however the people inside had been evacuated by Section D and the explosion was staged.
Blake then calls the Cabinet Office and says he is invoking Protocol Landslide, an emergency evacuation of the government and royal family to deep-level nuclear shelters.
Although Blake's actions throughout the day had managed to prevent Britain from going bankrupt, he resigned after a long conversation with Harry, who offered his support.
He was featured in the first episode of the ninth series, being revealed as a senior member of Nightingale who ordered the hotel bombing during the Pakistan-India summit, resulting in the death of Ros Myers and Blake's successor Andrew Lawrence at the end of the Series 8 with Blake's resignation being a smokescreen to cover up his Nightingale affiliation.
Harry Pearce visited him at his home in Scotland, poisoning him with tainted whisky which caused Blake to appear to die from a heart attack; before Blake died he expressed regret and sadness about Ros' death and commented that by being a member of Nightingale, he had a chance to change the system for good.