Over the last six decades, some of the most threatening enemies of the Doctor have become repeat offenders, making several appearances and becoming the longest-running villains in Doctor Who. While the time-traveling Doctor and their human companions have fought countless one-off villains in Doctor Who’s 62-year history, including the likes of the Flood, the Kandyman, … Continue reading 10 Best Long-Running Doctor Who Villains, Ranked By Most Appearances