Eric Millegan plays Addy, a former lab assistant turned serial killer, on the crime drama. Addy, who appeared regularly in the first three seasons, will have a recurring role in the 12th and final season.
Season 12 of Bones begins on January 3rd at 9 p.m. ET/PT.
Watch the new preview below:
What do you think? Are you a fan of Bones? Are you excited for the final season?