S1·E41 Adventures in the Forbidden Zone

Hercules clashes with a new cadet named Theseus, which starts out as a rivalry and ends up as a battle for survival when Theseus challenges Herc to a chariot race. The problem is the race takes place next to the area known as the Forbidden Zone, where mortals go in but don't come out, and its next victims may be Herc, Theseus, and Iolaus.