Spooks returns with the team trying to rescue Harry!
Richard Armitage plays Lucas North, who was released after eight years in a Russian prison.
Nicola Walker plays Ruth Evershed, who returns to The Grid in fear for her life.
Last series Ros Myers (Hermione Norris) was appointed Head of D Section.
Shazad Latif joins the cast as technician Tariq Masood.
One of the longest-serving characters, data analyst Malcolm Wynn-Jones (Hugh Simon), returns to series eight. Is his number up this time? Watch Spooks, BBC1, November 4, at 9pm