The nightmare sequence was digitally colored. The rest of the episode was animated traditionally, with ink and paint.
The plot of this episode parallels the Sister Act movie series. In Sister Act (1992), Whoopi Goldberg joins a group of nuns as part of a witness protection program. In Sister Act 2: Back In The Habit (1993), Whoopi pretends to be a nun to teach at a Catholic school. Kathy Najimy, who plays Peggy, is a part of the Sister Act series as well.
The obituaries in the paper are from the Los Angeles area in mid-May, 2001.