Wikipedia
Bigfat
"Bigfat" is the seventeenth episode of the eleventh season and the 205th overall episode of the animated comedy series Family Guy. It aired on Fox in the United States on April 14, 2013, and is written by Brian Scully and directed by Julius Wu. In the episode, Peter, Quagmire and Joe take a road trip to Canada, but their private plane crashes and Peter goes missing for two months. When his family finds him, he can no longer communicate intelligently.