S2, E13: Antonio (Jon Seda) and his sister Gabriela (guest star Monica Raymund) go to the office of Elliot Gish (guest star Robert Knepper), the man they believe started the fire that killed Shay. Intelligence along with patrol officers Burgess (Marina Squerciati) and Roman (Brian Geraghty) put pressure on Gish to try and make him confess. Lindsay (Sophia Bush) approaches Voight (Jason Beghe) about returning to Intelligence when she realizes that the task force isn’t what she thought it would be. At the same time Desk Sgt. Platt (Amy Morton) is acting strange and has everyone curious as to why she’s being overly cheery, friendly and nice.