Law & Order SVU is the only prime time drama to be spun off from two separate shows: Law & Order and Homicide: Life on the Street (through the character of John Munch)
The characters Olivia and Elliot are named for producer Dick Wolf's children.
After the 9/11 attacks, the opening credits were re-edited to remove the twin towers.
Mariska Hargitay keeps a picture of her real-life mother, Jayne Mansfield, on her fictional character's desk.
Kathryn Erbe's pregnancy was incorporated into the show by having her character Alexandra, be a surrogate mother.
Fin's last name, Tutuola, means "the gentle one" in Yoruba.
The show is filmed in Chicago. The actors/actresses trained for 3 months beforehand with retired S.W.A.T. personnel and real Chicago Police officers.
Chicago P.D. is one of the few shows that is produced with the approval of the Chicago Police Department. The show has permission to use accurate uniforms, insignia, and markings.
Dateline correspondent Lester Holt appeared in the movie “The Fugitive”?