Eamonn Walker has been playing Wallace Boden on Chicago Fire from the very beginning, and has arguably been the most pivotal character of the series aside from Casey and Severide.
He’ll mark the third star to depart full-time in Season 12, and his absence should shake the show’s foundation.
Severide stepped up in Boden’s absence in the most recent episode, as the ranking officer at Firehouse 51.
Boden is the man who the 51 heroes turn to in times of crisis as well as times of joy.