Review by bkoganbing

Hercules the Invincible finds Dan Vadis cast as the demigod son of Zeus who saves the life of a princess by slaying a couple of lions. Her father is ever so grateful, but asks him if he could do just one more little job for him, slay a dragon and yank out a back tooth which is said to be charmed. Hercules takes the contract and the dragon is summarily dispatched.

But while the dragon is being slain, some nasty dudes carry off the king, the daughter, and all other able bodied folks as slaves for their queen who lives inside a hollow volcanic mountain with her subjects. All they leave behind is John Simons who then becomes Hercules's companion.

Simons is about as useful to Hercules as Pancho was to the Cisco Kid. But the reason he was left behind is he's hardly a valiant types. The men of the kingdom eat the hearts of the valiant in the belief it will increase their courage. This guy will put it in the negative.

The rest of the film is concerned with the rescue with Hercules battling a bear, two elephants, and the volcano itself. He proves to be quite invincible.

Simons provides some nice comic relief for the audience. The big guy is stoic throughout Simons's cowardly goofiness.

Peplum fans should like this one.