LINDSAY’S MOTHER BECOMES INVOLVED IN A GRUESOME ROBBERY-MURDER CASE. Bunny (guest star Markie Post) comes to Lindsay (Sophia Bush) concerned about a suspicious repeat customer at her husband’s rental company. This lead brings Intelligence into a case which robbery-homicide has been working for months. Detective Gina Gawronski (guest star Angelique Cabral) downloads their intel to the team, she also happens to be Antonio’s (Jon Seda) former co-worker from Vice. Voight (Jason Beghe) doesn’t trust Bunny’s motives for the tip. Also starring Jesse Lee Soffer, Patrick Flueger, Elias Koteas, Marina Squerciati, LaRoyce Hawkins, Amy Morton and Brian Geraghty. Stella Maeve and Michael Filipowich guest star.