Retaliation Hit (S01E21)

Detective Voight (Jason Beghe) returns, looking to collect on the favor that Dawson (Monica Raymund) owes him for helping her brother, Antonio (Jon Seda). Casey (Jesse Spencer) falls back into old patterns in his personal life, while Dawson, Herrmann (David Eigenberg) and Otis (Yuri Sadarov) become the proud owners of a real neighborhood bar as Molly's prepares for its grand opening. Meanwhile, Severide's (Taylor Kinney) career is threatened. (iTunes)