Chicago Fire is losing a main character - at least for now - as the cast member goes on hiatus for the rest of the season. Dermot Mulroney, who plays Dom Pascal, will be absent from the rest of the season due to a story line that requires him off screen, according to Deadline. Mulroney is still expected to appear in the upcoming One Chicago crossover, which airs Wednesday, March 4. The actor will appear in the following episode and the hiatus will last until the end of the season.