"What we're trying to do is to create a world in Chicago," Wolf explained last month at NBC's TV critics press tour. "In actual fact, the police station, the exterior of the district office, which was the same exterior used in 'Hill Street Blues,' is a block and half from Firehouse 51 in Chicago. So the fact that these people intermingle is hardly surprising. You will have story lines that may arc over a couple of episodes. You may have appearances the way Dawson and Shay showed up when Willhite was shot at the end of the first episode and they're just taking them away. All of these guys are appearing back and forth. It's not going to be forced, but it will be fairly regular."
And look for Wolf's "Law & Order: SVU" to get in on the crossover action, too.
"The first episode back, I guess, after the Olympics is a crossover where ['SVU' stars] Ice and Kelli Giddish come to Chicago, and it's equally seamless," Wolf said. "Now ['Chicago P.D.' star] Sophia [Bush] is going to New York on Tuesday to do a scene in 'SVU' with Mariska. So we're looking at all aspects of this in terms of how these shows can cross‑pollinate each other. It's really fun."