Detective Mike Hanson ( Donnie Keshawarz ) mentions to Detective Jo Martinez ( Alana De La Garza ) that he used to be the frontman for a band. Donnie Keshawarz was the frontman for the prog-rock group Elements in real life before acting.
David Krumholtz, who plays a young Abe ( Judd Hirsch ) in the flashback scenes, previously played Hirsch's son in Numb3rs (2005).