In sixth-century BC Sicily, an Athenian bronze worker named Perillos traveled to the wealthy colony of Akragas to pitch a new device to its tyrant, Phalaris: a life-size hollow bronze bull with a door in its side and a system of pipes in its throat that converted a victim’s screams into the bellowing of an animal. This episode examines the engineering, the psychology and the legend of the brazen bull.

It explains how Phalaris seized power by diverting temple funds to hire mercenaries, why a ruler holding a city by force needed spectacle rather than mere execution, and how the acoustic design stripped the human frequencies from a scream to sever the audience’s empathy. It follows the sales pitch that promised incense-scented smoke and bones polished like jewels, the tyrant’s decision to lock the inventor inside for a demonstration, Phalaris’s own death in the bull after his overthrow around 554 BC, and the device’s reappearance centuries later in Christian martyr accounts involving Roman emperors.

• Why bronze’s heat conductivity and resonance made it the ideal material for the device
• Whether Phalaris acted from moral disgust or opportunism in trapping Perillos
• What Pindar and Diodorus Siculus tell us about the historical record
• Why the bull may have functioned more as a deterrent than a routine execution tool
• How early Christian writers used the bull as a symbol of pagan cruelty