Some "Pearls Before Swine" strips include appearances by the "Family Circus" characters or parodic "Family Circus" strips. In one series of strips, Rat is captured by "Family Circus" fans after poking fun at the "Family Circus". In the week of June 27, 2005, Stephan Pastis portrayed the cartoon Keane family inviting Osama Bin Laden into their house. Bin Laden is captured by the police while following Billy's dotted lines, and the whole family is imprisoned at Guantanamo Bay for harboring a terrorist.