My review of the previous episode: Gently Liberated.
As a mystery, Inspector George Gently is hard to assign a genre. It's more violent than cozies like Foyle's War, but hasn't abandoned its whodunnit roots for the high-octane pulp of Luther. Its violence is anchored by the moral code of its protagonist. Noir? Gritty mystery? In any case, both its morality and its darkness come together for one last showdown in Gently and the New Age.