The British espionage drama &quotMI-5&quot, provides more shocking twists and turns in its third season. Tom Quinn (Matthew Macfayden) disappears following a shooting and new man Adam Carter (Rupert Penry-Jones) rises to the challenge in Section B. After recovering from his injury, Harry (Peter Firth) tasks Adam with proving Tom&#39s innocence. Later in the season Danny (David Oyelowo) and Zoe (Keeley Hawes) are sent on a mission that has tragic consequences for one of them.