Guest Stars Nicholas Gleaves as Roger Penhaligon Paul Ready as Rob Macdonald Richard Riddell as Tom Fenton Nick Robinson as Himself Sophie Raworth as Herself Martha Kearney as Herself Tom Brooke as Andrew Apsted Michael Shaeffer as Richard Longcross David Westhead as Prime Minister John Vosler Claire-Louise Cordwell as PC Kimberley Knowles Laura Kuenssberg as Herself Shubham Saraf as Tahir Mahmood John Humphrys as Himself Bailey Patrick as SO15 Officer John Pienaar as Himself Gordon Corera as Himself Russ Bain as Police Officer Michael Müller as Commissioner James Staddon as College Dean Miriam Lucia as Shadow Home Secretary