A new documentary puts a camera inside ambulances and emergency rooms across the country, following paramedics as they respond to calls that could be anything from a heart attack to a car crash.

Into the Unknown follows EMS crews in Santa Barbara, Sparks, Denver, Baton Rouge, and Crozet over the course of a year. Director Tom Putnam, who made the firefighter documentary Burn, captures the split-second decisions, physical danger, and emotional weight that come with the job.

The film features paramedics Dr. Richard Carmona, Pat Coyle, Heather Edwards, Nicole Jagers, Niki Johnson, Anthony Judkins, Anne Kellogg, Trevor Oakley, John Tinsley, and Jenn Vazquez.

Executive producers include Steve Buscemi and Randolph Mantooth and Kevin Tighe, who played paramedics on the 1970s show Emergency! Mantooth and Tighe say the documentary is a tribute to the real professionals whose work helped inspire that series.

“Behind every uniform is a human being navigating trauma, loss, exhaustion, and the immense responsibility of making split-second decisions under extraordinary pressure,” according to the filmmakers.

Into the Unknown opens on digital platforms December 4.