An expatriate mathematician returns to England to find the nation transformed into a hyper-paranoid surveillance society, plagued by terrorists, fugitives, and spies. Searching for the truth about his brother's mysterious death, he is catapulted into an international conspiracy - and a passionate love affair with his brother's widow. The five-part thriller stars Benedict Cumberbatch (Atonement, "To the Ends of the Earth") as Stephen Ezard, Anamaria Marinca (4 Months, 3 Weeks, & 2 Days) as the enigmatic and beautiful sister-in-law Yasim, and Robert Carlyle (The Full Monty, Trainspotting) as rogue agent David Russell.

Sundays, 10/5-11/2/08 from 9-10 p.m. ET
Fridays, 10/10-11/7/08 from 2:30-3:30 a.m. ET