One snowy day in Springfield, Lisa informs Bart that she and Maggie share a bond that Bart will never understand because he doesn't have a brother, so Bart asks Homer for a baby brother. When Homer denies Bart's request, Bart makes his way to the Springfield Orphanage to find what he thinks he's missing.
original airdate--December 13,2009 rating--7.11 million
music--"The Simpsons Theme" by composed by Danny Elfman
Couch Gag:The living room furniture is dancing to disco music until the Simpsons come in and Homer yells, "Hey!" The furniture returns to normal and the Simpsons sit on the couch without incident.
Title Screen:Homer on a lawn chair with balloons flies by.