Actor Dermot Mulroney joins "Chicago Fire" season 13 as new fire chief, Dom Pascal.

Actor Dermot Mulroney joins "Chicago Fire" season 13 as the new fire chief, Dom Pascal, taking over from Eamonn Walker's departing character, Battalion Chief Wallace Boden. The new chief is described as a cheerful person with a different leadership style than his predecessor. Mulroney's casting aims to bring drama and attract new viewers to the series.