First appearance of both Billy Gibbons and Ty Panitz, who play Angela's dad and Booth's son Parker respectively.
Hodgins calls Brennan the Grinch while trying to decide what to give Angela for Christmas. T.J. Thyne (Hodgins) played Stu Lou Who in How the Grinch Stole Christmas (2000).
1943 Philadelphia mint copper pennies regularly sell for over $200,000 in almost uncirculated condition to over $750,000 in mint state 63+ at auction. There are also examples found to have been minted at the Denver and San Francisco.mints. There are over the twelve as stated by Bones but the numbers are very low. At the time of the characters death they sold for over $8,000..
This is the first time we see Hodgins & Zach shirtless.