Spooks (2002)

S3E1 Project Friendly Fire

After shooting his superior, Harry Pearce, Tom Quinn goes missing and faces allegations of murdering the Chief of Defence Staff. Taking advantage of the situation, Oliver Mace, the Chairman of the Joint Intelligence Committee, initiates a harsh investigation into MI5. Zoe, Danny, and the rest of the team are determined to clear Tom's name and protect their agency from a potential government takeover.