When Brennan walks into the diner and over hears Booth talking to Parker about how humans are different than apes, he tells her he's talking to a 4 year old. Ty Panitz, the actor who portrayed Parker, was actually 7 at the time the episode aired.
Jessica Capshaw appears as Rebecca Stinson, Agent Booth's (David Boreanaz) ex girlfriend and mother of their son Parker (Ty Panitz). She and David Boreanaz both starred in the movie Valentine (2001) together. Although Parker is a recurring character throughout the series, Rebecca only appears on-screen in one other episode, The Truth in the Lye (2006).