The intellectual chess match between Lamb and the mastermind Katinsky reaches its peak. Lamb proves that while he may be unkempt, his mind remains the sharpest tool in the MI5 arsenal.

continues to be one of the best thrillers on television by proving that "Old Scores" are the most dangerous kind of debt to settle.

Unlike James Bond, the characters in Slow Horses make mistakes, get stuck in traffic, and deal with bureaucracy. This finale rewards viewers by showing how these flaws actually make them effective in ways the "High Flyers" at the Park can't replicate.