Directed by: Don Chaffey
Starring: Laurence Naismith, Gary Raymond, Nancy Kovack, Todd Armstrong
Visible crew/equipment: When the hydra comes out of the cave,look closely at the ground. The track the hydra is being pulled across is visible.
Visible crew/equipment: The very first shot of a Harpy attacking the blind man is not up to the high standard of the rest of Harryhausen's work in this film - you can easily see two wires suspending the model as it "flies" down. These are better hidden in later shots.
Continuity mistake: When they arrive on the island of Talos, the bronze giant, Hercules and Hylus find the statues atop huge plinths. In close up, they are looking up at the statue of Talos, then in a wide shot they start to walk towards it across bare rocks, then in close up they are back where they were with plants behind them.