On February 7, 2019, Supernatural aired its 300th episode--a milestone few TV shows have ever reached. With fourteen seasons under its belt, the show is 7th on the list of the longest-running, still-airing, scripted U.S. primetime television series in history. This panel will take a look back at 300 adventures of Sam and Dean Winchester, highlighting the best (and the worst) episodes, character moments, and story arcs, as well as a discussion about what elements contribute to the longevity of a TV show.