Eamonn Walker is returning to his Chicago Fire post. First Deputy Commissioner Wallace Boden is back for one night only in the upcoming season 13 episode titled “Post-Mortem,” airing April 16 at 9 p.m. on NBC .

Eamonn Walker will reprise his role as Wallace Boden in an upcoming episode of 'Chicago Fire' nearly one year after his exit as a series regular was announced

Eamonn Walker will return to NBC’s Chicago Fire as Wallace Boden in the Season 13 episode titled "Post-Mortem” (#1318), which will air Wednesday, April 16 at 9/8c. Walker has portrayed the Battalion Chief turned First Deputy Commissioner of the Chicago Fire Department since the series premiered in 2012.