Things are about to go from bad to worse on Chicago Fire.

In the wake of his father's death on last week's episode, Chief Boden (Eamonn Walker) decides to take a leave of absence from Firehouse 51. In this exclusive sneak peek from Tuesday's new episode (10/9c, NBC), the team bids a solemn farewell to their trusted leader. However, their sadness over his departure quickly turns to anger when they realize a very familiar — and despised — face is joining the squad to fill Newhouse's spot.

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So who is it? And what does the new addition have to say? Watch the exclusive video below to find out:

Chicago Fire airs Tuesdays at 10/9c on NBC. Will you miss Boden? Are you totally pissed about that rival's return?