In Greek mythology, Heracles released Prometheus from his daily eagle punishment.
Prometheus was chained to a mountain after defying Zeus and giving fire to humanity. Each day an eagle consumed his liver, which regenerated overnight. During his heroic labors, Heracles encountered Prometheus and killed the eagle, ending the recurring torment.
The rescue places Prometheus within the larger cycle of Heracles’ adventures and divine encounters. Some versions explain that Zeus permitted the release, while others emphasize the hero’s direct action. Ancient myth rarely forms a single fixed canon, so details can vary by author.
Heracles is the Greek hero whose Roman name is Hercules. In a question about Greek mythology, Heracles is the more precise canonical answer. The episode is separate from Pandora’s opening of the jar, though both stories arise from Zeus’s conflict with Prometheus.