Dermot Mulroney is leaving NBC’s “Chicago Fire” in Season 15, multiple outlets report. The actor, who joined the series in its 13th season as Battalion/Chief Dom Pascal, will wrap up his storyline early in the upcoming season, according to sources close to production and confirmation reported by outlets. Variety and Deadline both state that his departure occurs before the season concludes, though details of his final episode and the specifics of his exit storyline are not provided in the reports. TVLine similarly reports that Mulroney will exit the show in Season 15, portraying Dom Pascal. “Chicago Fire” returns for its new season on Oct. 7 at 9 p.m. ET, as reported by Variety. Mulroney’s departure marks another cast change for the long-running firefighter drama as it prepares for its next season, with production and scheduling information tied to the season premiere date.