Heathcliff and the Catillac Cats

Heathcliff's Middle Name [Heathcliff] (1x9)

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A movie star named Rock comes to town to film a new movie, and Sonja is thoroughly smitten. Heathcliff is wildly jealous, but Sonja forbids any fighting. However, when Rock is exposed as a fake - from his toupee to his false teeth - Sonja's affections return to our hero.