AdDermot Mulroney, who has starred as Battalion Chief Dominic "Dom" Pascal since season 13, will be leaving the series in the upcoming 15th season. Whilst details haven't yet been revealed, Variety reports that his storyline will be wrapped up "early in the show’s upcoming season". For one, things ended on a very dramatic cliffhanger in the season 14 finale. Dermot Mulroney as Chief Dom Pascal in Chicago Fire season 13. Chief Pascal returned in the final season 14 episode and was discussing his future with Kelly (Taylor Kinney) but the pair were interrupted by an emergency call.