Guest Stars Jon Seda as Detective Antonio Dawson Jeff Hephner as Jeff Clarke Jesse Lee Soffer as Detective Jay Halstead Brittany Curran as Katie Nolan Daisy Betts as Firefighter Rebecca Jones Christine Evangelista as Paramedic Allison Rafferty Co Starring Randy Flagler as Firefighter Harold Capp DuShon Brown as Connie Kurt Ehrmann as Chief Joel Tiberg Victoria Blade as Lisa Monette McLin as Nurse Kris Wheeler as Thurber Christopher R. Ellis as Rick Sandoval Carolyn Braver as Tina Anthony Fleming as Gunman #1 Darryl Johnson as Instructor Keith D. Gallagher as Gunman #2 Meg Thalken as Administrator Paul Oakley Stovall as Mr. Adkins Spencer Curnutt as Jeremy Toni Martin as Giselle Vance Smith as Construction Worker Kevin Cox as Gunman #3 Uncredited Anne Lockhart voices Dispatcher