Spooks
Episode 3
S5 E3:
Zaf has infiltrated a British al-Qaeda cell and is living alongside two young Muslim extremists in an attempt to influence one to become an MI5 double agent. But the stakes are raised when the cell's leader announces a plan to attack London with a state-of-the-art bomb.
Starring
Gugu Mbatha-Raw, Larry Lamb, Ofo Uhiara