Every season of An Unexpected Killer ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of An Unexpected Killer!

A wild and unpredictable journey into homicide investigations where the true identity of the killer comes as a shocking surprise. Combining unparalleled access, captivating interviews and stylish reenactments, each investigation starts in a familiar way - examining the crime scene, interviewing potential suspects… but then something unexpected changes everything. A new witness, an overlooked piece of evidence or even an innovation in forensic science sends investigators on a totally unexpected path that ultimately leads to the conviction of the real killer.

The Best Seasons of An Unexpected Killer

Every season of An Unexpected Killer ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of An Unexpected Killer!