There is a slow-burning relationship between Detectives Lindsay and Halstead, Olmstead teased, "[There will be] further slow burning, because, as has been made clear to them by Voight, he doesn't tolerate in house romances." And showrunner Leight teased about sexual tension in TV Guide on November 11, "Lindsay and Halstead have this unrequited crush on each other, and you have Rollins and Amaro with a down-low affair going on. There's a moment or two when it seems like one group notices something about the other. We tease a little bit with that." Leight adds that going to Chicago will bring out a new side to the characters, particularly Amaro. "[He is] much more physical than he gets to be on our show," he adds.
