Whodunnit? is a murder mystery reality competition television series broadcasted on ABC. The series premiered on June 23, 2013, and airs on Sunday nights at 9 PM Eastern Time.
The series follows 13 investigators living in a mansion, Rue Manor, where one of the investigators is the "killer." A "murder" takes place around which the players base their investigation using CSI technology and establishing pacts among one another. At the end of each episode, each player, in a private video confession, explains how the murder took place; the end credits indicate that they also take a written test on the crime, as on the previous ABC show The Mole. During dinner, Giles hands each investigator an envelope, presumably from the killer. Those who deduced most accurately receive a card saying "Spared", while those doing the worst receive a card saying "Scared" and are up for elimination. During the night, the "killer" "murders" one of the "Scared" players, eliminating that investigator from the game, and setting up the "murder" for the next episode. In the finale, the investigator to correctly solve the identity of the "killer" wins $250,000.