Hercules in the Haunted World

Reg Park stars as Hercules, who learns that his lover Princess Deianira has lost her senses and seeks the Stone of Forgetfulness in the realm of Hades to restore her health. With the help of Theseus (George Ardisson) and Telemachus, Hercules embarks on a perilous journey, unaware that his guardian King Lico (Christopher Lee) is behind Deianira's condition and plans to exploit her for his own gain.