Chicago Fire 4×06 “2112” – Chief Boden (Eamonn Walker) meets his new neighbor (guest star Ilfenesh Hadera), who asks him for a favor that leads to serious consequences. Severide (Taylor Kinney) takes offense to being treated like a candidate by Captain Patterson (guest star Brian White) by undermining him during a call and the situation reaches a boiling point. Cruz (Joe Minoso) receives a surprise visit from his past when Freddie (guest star Ralph Rodriguez), a gangbanger who knows Cruz’s brother Leon, comes to visit and ask for a favor. Elsewhere, the team is called to a harrowing scene of an 18-wheeler and receive a thanks in the form of tickets to see the band Rush, much to Mouch (Christian Stolte) and Herrmann’s (David Eigenberg) delight. Jesse Spencer, Monica Raymund, Kara Killmer, Dora Madison and Yuri Sardarov also star. Steven R. McQueen, Marina Squerciati, Melissa Ponzio and Tom Amandes also guest star.