Of course, Michael Dunn was the main recurring villain in The Wild, Wild West -- probably the role he's most famous for. Back when TNT reran the series, they once did a week of five of Dunn's Miguelito Loveless episodes in five days, and it was either the first five or five of the first six or something. It was kind of sad how Loveless started out in his debut episode as a complex, nuanced antagonist with sympathetic motives and then got progressively more one-dimensional and caricatured with each successive episode. It was negative character development.