Guest Stars Randy Flagler as Firefighter Harold Capp Amy Morton as Desk Sergeant Trudy Platt Melissa Ponzio as Donna Boden Kenny Johnson as Firefighter Tommy Welch Matthew Del Negro as Interim Chief Pat Pridgen Co Starring Anthony Ferraris as Squad 3 Driver Tony Ferraris Steve Chikerotis as District Chief Steve Walker Kurt Ehrmann as Chief Joel Tiberg Alex Weisman as Paramedic Allen Chout Jacqueline Williams as Officer Becerra Joe Keery as Emmett Lily Mojekwu as Veronica Harrington Alan Ball as Duncan TayLar as Woman Ulises Acosta as Teenage Boy Michael Harp as AJ Amanda Wells as Secretary Nicholas Caesar as Security Guard Margot Thorne as Sarah Grace Melon as Deirdre F. David Roth as Brent Daniels Tim Ryder as Phil Uncredited Anne Lockhart voices Dispatcher