Hercules: The Legendary Journeys (Season 1, Episode 1)

Hercules faces the She-Demon, a half woman half snake monster that turns people to stone by hitting them with the stinger at the tip of her tail. She turns Iolaus into a statue, but Hercules tricks She demon into hitting herself with her own stinger, turning her to stone. With this, the monster's victims are restored back to normal.