S2, E18: Lt. Severide (Taylor Kinney) sticks his neck out for Dave Bloom (guest star W. Earl Brown), a fellow firefighter from Denver who is troubled by addiction. Elsewhere, Dawson (Monica Raymund) and Shay (Lauren German) leave town for a "girl's weekend" at a cabin in the woods. Meanwhile Jones (guest star Daisy Betts) struggles with the knowledge that her father is pressuring Chief Boden (Eamonn Walker) about her career path and Mouch's (Christian Stolte) internet dating profile gets an upgrade with the help of Mills (Charlie Barnett) and the guys.