Sophia Bush

 

Credit: Mark Seliger/NBC

Sophia Bush

The lead of Chicago P.D. left the show suddenly after four seasons, never clearly explaining her decision. She hinted at it through Instagram in October 2017, responding to a fan question with, “I left because I wanted to. End of story.” She later added in a podcast that eventually she’ll tell her whole story. “I had to respect myself in a situation where I didn’t feel respected,” she said in December.