NBC | 10:00 pm
After coming across some important new information, Dawson and Casey (Monica Raymund, Jesse Spencer) redouble their efforts to discover Bria’s (guest star Quinn Cooke) whereabouts in the new episode "Slamigan." Meanwhile, Severide (Taylor Kinney) reconnects with Chief Grissom (guest star Gary Cole) and an old family friend. Elsewhere, Cruz (Joe Minoso) turns to Brett and Mouch (Kara Killmer, Christian Stolte) to help him create a new tool. Daniel Di Tomasso also guest stars.