In the first-season finale (which aired on May 17, 2006), Brennan stated that she was born in 1976, which would have made her either 29 or 30 (approximately the same age as Deschanel, who was born on October 11, 1976). In the fifth-season episode "The Death of the Queen Bee" (which aired nearly four years later, on April 15, 2010), it is implied that her then-current age was 33 years, based on Brennan's identification of a former classmate from Burtonsville High School (presumably located in Burtonsville, Illinois) as the victim and statement that the classmate was 33. In "The Woman in Limbo" it is revealed before her parents’ disappearance, her family lived in Chicago, Illinois.