Although news had already broken that Jon Seda, who had played Antonio from way back in Chicago Fire Season 1 before P.D. even existed, would be leaving the series, the finale didn’t give him a sendoff that would explain why he wasn’t around when the show returned.
Now, Chicago P.D. showrunner Rick Eid has revealed that P.D. isn’t finished with Antonio Dawson, despite Seda’s absence.
Chicago P.D. will be missing one of its original characters when it returns for Season 7, but you wouldn’t have known it based on how Season 6 ended in the spring.