According to sources, the cast departures stem from creative reasons related to the characters’ story evolution.
Seda, who plays Detective Antonio Dawson, was one of the original stars of Chicago P.D. He started off as a recurring on the mothership Chicago Fire before he and Jason Beghe were spun off to anchor spinoff Chicago P.D. as the leads. Seda left Chicago P.D. midway through Season 4 to join new legal drama spinoff Chicago Justice. He returned to Chicago P.D.