"Supernatural: Sam and Dean Meet the Ghostfacers - Season 3 [CLIP] | TNT" is an article summarizing the plot of an episode from season 3 of the TV show "Supernatural." The article focuses on Sam and Dean Winchester encountering a group called the Ghostfacers, who are paranormal investigators. The main idea is that the Winchesters meet the Ghostfacers and join forces to investigate a haunted location, resulting in an entertaining and suspenseful episode.