Guest Stars Christian Stolte as Firefighter Randy "Mouch" McHolland Joe Miñoso as Firefighter Joe Cruz Yuri Sardarov as Firefighter Brian "Otis" Zvonecek Sarah Shahi as Renee Royce Jeff Lima as Leon Cruz Mo Gallini as Firefighter Jose Vargas Cody Sullivan as Ernie Ron Dean as James Whoritsky Co Starring Randy Flagler as Firefighter Harold Capp DuShon Brown as Connie William Smillie as Kevin Hadley Katherine Cunningham as Corrine Brett Snow as Firefighter Brett Snow Rich Wilkie as Engine Firefighter Darrell W. Cox as Uncle Ray Jose Antonio Garcia as Flaco Lance Baker as Mark Cindy Jackson as Firefighter Laura Fisher as Business Woman Paige Smith as Machinist Jonathan Kitt as Security Guard Tom McElroy as Dr. Tenney Sean Bolger as Maintenance Man Matthew W. Allen as Assistant Deputy Chief Uncredited Anne Lockhart voices Dispatcher