Severide feels sidelined as he leaves Detective Lindsay and the Intelligence Unit to do their job and locate his sister Katie. Shay gets an unusual tip from Chicago Blackhawk players Brent Seabrook and Duncan Keith, who makes friends with Clarke and ... (more)stop by Molly’s. Meanwhile, Casey learns more about his head injuries after another close call and Dawson pushes hard to pass the physical test at the Academy.

Brittany Curran, Christine Evangelista, CJ Adams, Daisy Betts, Jake Weary, Jeff Hephner, Jon Seda, Melissa Ponzio, Sophia Bush