The title "The Changing of the Guardian" is a pun on the term the changing of the guard.
The Guardian | Blind Guardian | Guardian Council | Office of the Public Guardian | Chinese guardian lions | The Guardian (TV series) | the Guardian | The Guardian (2006 film) | Legal guardian | Changing Rooms | The Changing Room | San Francisco Bay Guardian | Guardian Media Group | Guardian Industries | Changing Lanes | The Time Guardian | The Guardian (1713) | The Changing Light at Sandover | legal guardian | Guardian of the Threshold | Guardian Angels | Changing of the Guard | Changing Hearts | Changing All the Time | White Guardian | The Menomonee Falls Guardian | The Guardian (Nigeria) | The Changing of Times | The Changing of the Guardian | Scorched: South Africa's Changing Climate |
He currently works as a co-executive producer on The Simpsons and is credited with having written six episodes: "Treehouse of Horror XI" (the "G-G-G-Ghost D-D-D-Dad" segment), "Homer vs. Dignity", "Father Knows Worst", "Boy Meets Curl", "The Blue and the Gray", "The Daughter Also Rises", and "The Changing of the Guardian".