A live in-depth look at the brave American heroes -- including firefighters, police officers, EMS technicians and first responders -- who put their own lives on the line as they race into danger to save others. Each week, the show embeds cameras in multiple cities across the country to document a night in the life of these units. Host Josh Elliott provides live analysis and commentary, with help from a team of experts, as the show follows first-person accounts of the action. Dick Wolf serves as executive producer.