Prometheus Unbound (Aeschylus)

[1] Nevertheless, these fragments, combined with prophetic statements made in the first play of the trilogy, allow the reconstruction of a broad outline.

A lengthy fragment translated into Latin by the Roman statesman Cicero indicates that the play would have opened with Prometheus visited by a chorus of Titans.

Finally, the faulty dramatis personae mentioned above and several fragments indicate that Heracles visits the Titan just as Io had in Prometheus Bound.

Heracles kills the eagle that had been torturing Prometheus by eating his regenerating liver every day and frees the Titan.

[2] Again mirroring events in the previous play, Prometheus forecasts the travels of Hercules as he concludes his Twelve Labours.