Well written spy story. Superior acting from a strong cast, including Christopher Walken - one of my all-time favourites. Nighy is really great in the role.
Its a real shame that there are only 3 episodes/movies to enjoy. These films make a really refreshing change from the multi-million-dollar big set piece, car-crash, action-packed Hollywood movies (eg James Bond, Jason Bourne).
It would be good to know if there might be future episodes to look forward to.