A.J Cook's second son Phoenix plays Michael, J.J's new son. Her oldest son, Mekhai Andersen, has portrayed J.J's oldest son Henry since he was a baby.
Filling in Kate Callahan' s (Jennifer Love Hewitt) role in the BAU is Dr. Tara Lewis (Aisha Tyler). Hewitt and Tyler worked together previously on the show Ghost Whisperer (2005)
The Puncinella character is the origin of Punch in Punch and Judy shows.
The bright clothes and long ridiculous nose are taken directly from the commedia dell'arte character.
Rossi references the Mafia and "sleeping with the fishes." Joe Mantegna played Joey Zasa in The Godfather Part III (1990).