Pac-Man Fever is the 20th episode of Season 8.
Concerned about the physical toll the second trial took on Sam, Dean benches his brother from hunting until he heals up. So, when geektastic hacker Charlie stumbles upon a case and finds the boys, Dean decides it’s time to teach Charlie how to be a hunter-in-training. While happy to see “her highness,” the boys suspect Charlie is hiding something; a secret that could get her killed.
Not much known- Current information is that Dean encounters Charlie in a virtual video game world - a game that Charlie plays. He has to work his way through the game, without being killed by the classic game villian.
This is the first time that even after playing the "FBI" card, the hospital authority refuses to show them the body.
Charlie mentions that the Supernatural books by Carver Edlund are all online now, even though the brothers burned all the paperbacks.