Hercules: The Legendary Journeys - S05E12 - Sky High

When a volcano threatened to destroy the people of Mount Pelion, Hercules decided to blow a hole in the far side of the volcano, allowing the lava to flow into the sea. The Amazon Ephiny joined him, and for a third, Hercules enlisted Kurth, a young man condemned to die for murdering the Centaur Nagus’ son. Hercules convinced Nagus to help pull the wagon of explosive crystals. Most of the crystals were lost in a mishap, so the remainder had to be deposited directly in the crater mouth. Kurth took care of this suicide mission, redeeming himself in the process.