Spooks The Greater Good is a 2015 British spy film, continuing from the British spy series Spooks known as MI5 in some countries, which aired on BBC One from 2002 to 2011. Jonathan Brackley and Sam Vincent wrote the script for the film, with Bharat Nalluri directing. Peter Firth reprises his role as Harry Pearce, who appeared in all ten series of the programme. Also returning from the TV series are Tim McInnerny as Oliver Mace, Lara Pulver as Erin Watts, Hugh Simon as Malcolm WynnJones, and Geoffrey Streatfeild as Calum Reed. Kit Harington and Jennifer Ehle star as new characters in leading roles.
Set several years after the end of the TV series, Harry Pearce Peter Firth is still head of the counterterrorism department Section D at MI5. Harrys team is transporting apprehended terrorist Adem Qasim Elyes Gabel through London when the convoy is attacked, allowing Qasim to escape and a CIA operative to be killed. MI5 is humiliated in the press, and relations between British and American intelligence agencies are frayed. Realising that the CIA will demand a scapegoat and that he is soon to be decommissioned from MI5, Harry seemingly commits suicide by jumping off Lambeth Bridge into the Thames.However, its quickly revealed Harry is alive and has faked his death so he can investigate his suspicions that Qasims transport was sabotaged by someone high up in MI5 who is trying to destroy the organisation from the inside. Before Qasims arrest, Harry had tasked his former section chief, Erin Watts Lara Pulver, with going undercover inside his terrorist cell, and is quickly able to use her information to track down the fugitive Qasim, who is hiding in the English countryside. Harry does not call in MI5 and instead meets with Qasim to offer him a deal he will get Qasim what he wants if he gives him the MI5 contact who helped him escape. Qasim responds by revealing he discovered Erin was an undercover agent and has taken her hostage. He shoots Erin in the stomach and tries to force Harry to finish her himself lest she die a slow death which will be recorded for her daughter to see. Harry cant bring himself to do it so Erin takes the gun and shoots herself to spare her daughter the video. After this, Qasim agrees to Harrys deal. ........
Source: Wikipedia