Hercules: The Legendary Journeys

Stranger in a Strange World (4x5)

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A lightning bolt from the dying Zeus opened a vortex to a parallel universe, where Iolaus was a jester and Hercules was the malevolent Sovereign. This alternate Hercules and the alternate Xena were lovers, and they were attempting to kill Zeus with Hind blood. Ares, meanwhile, was the god of love, not war, and Aphrodite was a modest, sensitive goddess. When the vortex reappeared, Hercules, Iolaus, the Sovereign and the alternate Iolaus all wound up inside and fought a furious battle. Each managed to return to his proper universe except the Sovereign, who was trapped inside the vortex.