Firebug is a measured investigative series about fire, expertise, and suspicion. Its central case begins with Southern California arsons and the devastation left behind. The show does not treat fire as background spectacle. It treats it as a scene to be read. In Chapter One, the destruction at Ole's home center becomes a procedural puzzle, with missing shoppers, collapsing structure, and investigators trying to keep death from bending their conclusions. That discipline matters. Jim Allen, an arson investigator for the state fire marshal, describes the need to separate grief from evidence while standing inside a disaster that already feels personal. Then John Orr appears in the frame. He identifies himself as a captain with the Glendale Fire Department and assigned as the arson explosive supervisor, a man whose professional knowledge makes every later detail feel more charged. Firebug builds that tension slowly. It moves from public catastrophe to private unease, from fire scenes to family recollections, from technical explanations to phone calls that snag on dates, memory, and control. Lori Kovach, John Orr's daughter, gives the family chapters a different gravity. Her memories include affection, anger, stalking, and moments when ordinary errands or visitors seemed to bring him suddenly to the door. The series is careful with that material. It lets domestic detail curdle without overplaying it. Recorded conversations add another layer, especially when questions about timelines turn into frustration or silence. The show also widens briefly to another arson case, including Thomas Sweat's letters to Jamison, which sharpen its interest in motive, self-presentation, and the split between public face and hidden behavior. Firebug is not a breezy case recap. It is a file assembled from burn patterns, witness memory, family damage, letters, interviews, and the strange intimacy of people who know how fire moves. Its best moments are procedural and human at once. A building burns, an investigator looks for origin, and a family member remembers what it felt like to live near someone whose anger seemed to travel ahead of him. The result is grave, controlled true crime for listeners who prefer evidence over theatrics.