Intelligence Gets to Work Without Antonio in 'Chicago P.D.' Season 7 Premiere (PHOTOS)

Who killed Kelton?

That's the burning question in the Chicago P.D. Season 7 premiere, as the finale left off with the newly elected mayor found murdered in his home. The prime suspect appears to be Voight (Jason Beghe), seen driving away from the scene as the Intelligence Unit arrived.

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Across the shows, characters' futures were left up in the air and mysteries were introduced.

Fans are also wondering how the NBC drama is going to write out one of its original cast members, as Jon Seda's last episode was the Season 6 finale. We still don't know, but you can click through the photos in the gallery above to see the rest of the team working a case without Antonio Dawson.

Chicago P.D., Season 7 Premiere, Wednesday, September 25, 10/9c, NBC