Harry is in big trouble, Lucas is in Moscow and the rest of the Grid are under scrutiny as the hunt for the traitor reaches its conclusion in the series' nail-biting penultimate episode.
Absorbing then-and-now interviews with the "faces" of the 60s (including Lulu, above). Bernard Braden's 1968 footage has never been shown on TV before.
Laurence Rees's enlightening history series explores how the Western Allies dealt with Stalin over the future of Poland, the very country Britain went to war to defend.
Kicking off an evening of Jane Austen - including Persuasion at 9:00pm and a documentary about her at 11:00pm - this is a new series examining our love of, and the trends in, costume drama.
Niall Ferguson delivers an engaging essay on the herd mentality of stockmarket bubbles and why they keep happening, from 18th-century Louisiana to the Enron fraud.
Mark Wahlberg stars in a tough revenge drama about foster brothers avenging their mother's murder, a modern and loose remake of The Sons of Katie Elder.