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Greg "Mouse" Gerwitz (born 1985) is an Expert Army Ranger who served alongside Jay Halstead in the 75th Ranger Regiment. He formerly held a job at the CPD Intelligence Unit as a civilian tech and surveillance expert before re-joining the Army Rangers in Season 4.
3 days ago · Greg "Mouse" Gerwitz made his first appearance in the Chicago P.D. Season 1 finale ("A Beautiful Friendship") as a close friend and criminal informant for Jay Halstead.The two men were quite close ...
Nov 23, 2021 · One of the most notable ties to the past, however, is his bond with fellow Ranger Greg “Mouse” Gerwitz. Halstead and Mouse have collaborated on a handful of cases during the show’s history, with the former even helping him get an intelligence tech job.
- Al Olinsky. Of all the losses on Chicago P.D., Al Olinsky’s was one of the hardest. Al and Voight had been friends for years and formed the Unit together.
- Erin Lindsay. Since the start of Chicago PD, Sophia Bush’s Erin Lindsay was a key figure in the series. Raised almost as a foster daughter by Voight, Erin rose to become a top detective.
- Sean Roman. Sean Roman is unique in that he got two big goodbyes on Chicago P.D. After two years as Kim Burgess’ partner (and briefly lover), Roman was shot in Season 3.
- Greg Gerwitz. Best known by his nickname “Mouse,” Greg Gerwitz had appeared in Season 1 as a former Army friend of Halstead who was used as a criminal informant.
Nov 9, 2022 · Samuel Hunt’s Greg “Mouse” Gerwitz is one of the most beloved characters in NBC’s police procedural series ‘Chicago P.D.’ that left the show. Mouse was Jay Halstead’s buddy when they were together in the 75th Ranger Regiment.
Dec 4, 2023 · Samuel Hunt, renowned for his portrayal of Greg “Mouse” Gerwitz on the hit TV series Chicago PD, bid farewell to the show during its fourth season. In a pivotal storyline, Mouse opted to re-enlist in the Army, a choice met with resistance from his friend Jay Halstead, who was concerned about the profound impact of war on Mouse’s mental ...
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Portrayed by Jesse Lee Soffer. Detective Jason "Jay" Halstead first appears on Chicago Fire as an undercover cop assigned to shadow and take down a local mobster who is harassing Gabriela Dawson, one of the owners of Molly's bar.