Overview
During a handover to the head of counter-terrorism of MI5, Harry Pearce, a terrorist escapes custody. When Harry disappears soon after, his protégé is tasked with finding out what happened as an impending attack on London looms, and eventually uncovers a deadly conspiracy.
| Actor | Age then | Age now | |
|---|---|---|---|
 | 61 | 71 | |
 | 28 | 38 | |
 | 31 | 42 | |
 | 45 | 55 | |
 | 58 | 68 | |
 | 28 | 38 | |
 | 32 | 42 | |
 | 49 | 59 | |
 | 34 | 45 | |
 | - | - |