This episode features actress Sophina Brown as Bianca Styles, a member of the ELM, the enviromental activist group heavily featured in this episode. Brown would later come back to the show as a series regular playing a different character named Nikki Betancourt, a brash new agent assigned to Don's unit at the FBI.
Episode guest star Loren Dean (Stevens) went on to play a recurring character in the similarly-premised show Bones, about a forensic anthropologist and her team who partner with an FBI agent to solve murders. The previous episode ("Bones of Contention") heavily featured forensic anthropology and the episode following this one ("The O.G.") guest stars Tamara Taylor who starred in Bones as a member of the forensics team (and former police officer).