MI-5 Season 10 contains only 6 episodes, but it packs a major punch. The BBC model is to create a full-length movie for a season, and then show it in one-hour segments. As usual, there is a common theme to each show: The Russians and the U.K. are bonding, and forming a 'new' co-operative relationship, and someone is running an OP to stop the process. Suspect No. 1 is the CIA, who have their own reasons for not wanting to see England drift into the camp of the former KGB. Typical of the 'Spooks' tradition, no mainstay characters on the show are guaranteed to survive to next season. Harry Pearce is engaged more than previously in the espionage activities, which puts his career in jeopardy. Edge-of-yer-seat suspense - wouldn't do any good to challenge you to just watch one episode - once you start, you can't stop. Enjoy.