Spoiler: 5/17/17 Season 4 Finale Chicago P.D. "FORK IN THE ROAD" 05/17/2017 (10:00PM - 11:00PM) (Wednesday) SEASON 4 FINALE -- LINDSAY MUST NAVIGATE AROUND CPD POLITICS WHEN HER MOTHER IS IMPLICATED IN A MURDER CASE. When Lindsay (Sophia Bush) receives a panicked call from her mother Bunny (guest star Markie Post) whose boyfriend had just been shot, Lindsay must figure out the best way to approach the situation, as her mother is now a murder suspect. The case opens up when a group of high school students OD, and the drugs in question relate back to the situation with Bunny. In addition to her mother's issues, Lindsay finds herself up against the review board dealing with consequences of her actions. Also starring Jason Beghe, Jesse Lee Soffer, Patrick John Flueger, Elias Koteas, Marina Squerciati, LaRoyce Hawkins and Amy Morton. Guest starring Tracy Spiradakos, Esai Morales, Chandra West, and Saul Stein. FYI: NBC has renewed Chicago P.D. for Season 5.