Lt. Casey and Dawson apply for permanent adoption of Louie, but quickly discover a hurdle. Firefighter-turned-medical student Jeff Clarke approaches Lt. Severide with an interesting proposition. With hopes of reinvigorating business at the bar, Otis convinces a skeptical Herrmann to throw a bash in celebration of the milestone 100th anniversary of Molly's, but not without complications.
Elenco: Jesse Spencer , Taylor Kinney , David Eigenberg , Joe Minoso , Christian Stolte , Eamonn Walker , Yuriy Sardarov , Kara Killmer , Monica Raymund , Miranda Rae Mayo , Charlie Barnett , Lauren German , Annie Ilonzeh , Alberto Rosende , Dora Madison , Steven R. McQueen , Daniel Kyri , Hanako Greensmith .