The 21st Century’s Best Sci-Fi Series Did What Most TV Shows Wouldn’t Dare

It’s often difficult for even very popular shows to last for many seasons. As actors become more famous, they may move on to other projects, and the cost of making the show can also increase. Plus, actors age, which can be a problem for characters who aren’t supposed to. While shows like The Walking Dead and Supernatural managed to run for over ten seasons, most excellent series have to end much sooner.








