Although Craig “Mouse” Gurwitch has never been a major character in NBC’s “Chicago P.D.,” he is certainly an integral part of the Intelligence Unit.

Mouse’s (Samuel Hunt) friend and fellow army man Jay Halstead (Jesse Lee Soffer) secured him the job of a tech analyst when he was drifting through life after his time in Afghanistan. Season 4 saw Mouse pleading Hank Voight (Jason Beghe) to write a letter requesting his felony record be buried so that he can reenlist in the army.

Voight refused to write the letter. Eventually, Trudy Platt (Amy Morton) wrote him that letter and got his felony record erased. He also enlisted in the army. So is Mouse really going to say goodbye to the team in “Chicago P.D.” Season 4?

The answer is a resounded yes. On the official Twitter account of “Chicago P.D.” a deleted scene was posted that shows him celebrating his farewell party. The Unit gathers at Molly’s and Mouse delivers a moving speech. After that the team toasts to his success.

“I wanted to take a second,” Mouse says in the video, “to say thank you.” “It’s been an honor to work here. For a long time, I was drifting round, looking for a family, a home. You guys gave me that.”

The scene ends with Halstead hugging Mouse while Lindsay (Sophia Bush) looks on. Halstead may not support his decision, but they are still good friends.

“Chicago P.D.” did not air a new episode this week due to the World Series. Season 4 returns with a brand new episode 6, titled “Skin In The Game,” on Wednesday, Nov. 9 at 10 p.m. EDT on NBC. Detective Olinsky (Elias Koteas) takes center stage when his friend gets accused of murder.

Are you okay with Mouse leaving Chicago’s police department? Hit the comments with your thoughts!

Chicago P.D. Mouse leaves the Intelligence Unit of the Chicago Police Department in order to join the army in “Chicago P.D.” Season 4. Photo: Matt Dinerstein/NBC