Episode 4
S04E04 - Airdate: 2005-09-29
Runtime: 60 min
MI5 discover that an Islamic terrorist is planning to enter the UK and launch an attack. Adam travels to Turkey to infiltrate the route, and seemingly persuades his target to work for MI5. But can they really trust their newest recruit, or is he actually more dangerous than ever before?
Episode details and rating from TVmaze.