This article contains spoilers for "Slow Horses" season 5, episode 4, "Missiles."

Nobody does bumbling characters better than "Slow Horses." This is, after all, a show about burnout spies who've managed to mess things up so badly they've been permanently banished to a shoddy office in the middle of London. But that doesn't mean the staff at MI5 headquarters, aka The Park, know what they're doing, as exemplified by the brilliantly slimy Claude Whelan (James Callis, who previously portrayed one of the best characters on "Battlestar Galactica" in Gaius Baltar). In "Missiles," however, Whelan suddenly displays some uncharacteristic competence when he threatens blackmailers by using the resources of the intelligence service to fight his way out of a bind.

Back in season 4, Whelan was appo

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