Speaking to Entertainment Weekly, Imperioli explained that his character Detective Louis Fitch will be faced with the return of his son Bobby in a future episode.
"[Fitch] left New York because there was this gangster who was threatening [him]," he said.
"He was working on this case and the gangster turned the tables on him and basically said, 'Look, if you don't leave town and leave me alone, your family is in danger'. So Fitch split."
He continued: "Then what happens is we find out the gangster has come to Detroit for some reason. So now Fitch's son has come to Detroit and the gangster has come to Detroit, so there's a recipe for a lot of tension."
Bobby will be played by Imperioli's real-life son Vadim and will make his first appearance in the 17th episode of the season.
Detroit 1-8-7 airs on Tuesdays at 10/9c on ABC.
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