Dermot Mulroney has joined the cast of NBC’s Chicago Fire for Season 13.  Deadline reported that Mulroney will fill the void left when Eamonn Walker, who played Chief Wallace Boden for all 12 previous seasons, exited the show. The role marks Mulroney’s return to a broadcast firefighter drama, after his stint in Season 2 of ABC’s Station 19.

Before the character of Boden was promoted to Deputy Commissioner of the Chicago Fire Department, he had chosen Christopher Herrmann (David Eigenberg) as his successor.  No official details about Mulroney’s characters have been revealed. The actor will play Chief Dom Pascal, who began his career with the CFD and is described as “an upbeat, competent Chicago Fire Department alum who has been working in Miami for the past decade and who is estranged from his wife.”

Chicago Fire also stars Taylor Kinney, Miranda Rae Mayo, Joe Miñoso, Christian Stolte, Daniel Kyri, Hanako Greensmith and Jocelyn Hudon.

Season 13 is slated to premiere on CBS on Sept. 25.

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