Why and How 8 Actors Exited the 'One Chicago' Franchise (PHOTOS)

Dan Clarendon

Dick Wolf's One Chicago franchise on NBC is losing three key players. Chicago Med's Colin Donnell and Norma Kuhling and Chicago P.D.'s Jon Seda are all leaving at the end of this current season.

And considering Windy City's finest face life-or-death stakes every day, a lot of other One Chicago characters have come and gone over the years.

Behind the Scenes of the 'One Chicago' Cover Shoot With the Stars of 'Med,' 'Fire,' and 'P.D.' (VIDEO)

Behind the Scenes of the 'One Chicago' Cover Shoot With the Stars of 'Med,' 'Fire,' and 'P.D.' (VIDEO)

Yaya DaCosta, Taylor Kinney, and Jason Beghe sat down to talk about the crossovers and pitch a new addition to the franchise.

While we brace for the impending exits of those three characters — and while we cross our fingers that they leave their shows in one piece — check out how and why eight other former mainstays left the franchise.

Chicago Med, Wednesdays, 8/7c, NBC

Chicago Fire, Wednesdays, 9/8c, NBC

Chicago P.D., Wednesdays, 10/9c, NBC