S2, E23: Retired Commander Perry (guest star Robert Ray Wisdom) enlists Voight (Jason Beghe) and the team to help extract his cop nephew from a unit of corrupt officers who are robbing drug dealers. When things go bad Voight must take down a younger, more violent version of himself. Meanwhile, Lindsay (Sophia Bush) struggles to stay clean. At the same time a woman from Olinsky's (Elias Koteas) past reaches out to him. Also starring Jon Seda, Jesse Lee Soffer, Patrick Flueger, Marina Squerciati, LaRoyce Hawkins, Amy Morton and Brian Geraghty. guest star.