
Eagle-eyed technical experts prove there is no such thing as a perfect crime as they assemble the pieces every criminal leaves behind. Dramatic crime re-creations and, sometimes, part of the investigations are a staple of the series. Some of the re-creations include alternate versions of the crimes, which are disproved by science. The show's episodes follow each case from the initial investigation until it reaches its legal resolution.
A decomposed body is found in a barrel, and a dilapidated address book may hold the answer, but investigators must find a way to read the pages because the passage of 30 years has turned them blank.
When a policeman's home burns to the ground, he later arrests a man who confesses to arson, but the confession seems dubious.
A mother and her two young daughters are found brutally murdered and sexually violated; the crime scene has no shortage of evidence, but investigators cannot find a conclusive link to their prime suspect.
A young girl is found dead, the victim of an apparent sex killer; there are few clues to the killer's identity, but authorities are intrigued by unusual orange fibers embedded in clothing found near the victim.