'Star Trek' (Original)
Recently, the original "Star Trek," which aired just three seasons from 1966-69, fell from the number 1 spot on the list to number 2. Yes, perhaps it didn't feature the best acting, or most compelling story plots, but it was a show that set the standard for future space epics since. The show is also more popular today than it was when it first ran. The show went on to inspire several movies, several spinoffs, and hordes of fans.