(NBC) "Chicago PD" premieres tonight on NBC.
It's a spinoff of the network's Tuesday night hit "Chicago Fire".
"Chicago Fire" fans came to know Sgt. Hank Voight last season as a crooked cop who wound up going to prison.
In "Chicago PD" Voight's connections within the Chicago Police Department got him out of prison and put him in charge of an elite intelligence unit.
Executive producer Dick Wolf says you can count on seeing characters crossing back and forth from time to time between "Chicago PD" and "Chicago Fire" in much the same way they crossed between the various versions of his "Law and Order" series.