The Addams Family (1992) (1992)

S1E16 Itt's Over

Uncle Fester mysteriously sprouts a full head of hair, but it’s so tough that no scissors, razors, or clippers can cut it. The rest of the family scrambles to find a solution before the hair takes over completely. From zapping it with electricity to trying bizarre home remedies, each attempt fails. As the hair keeps growing, the Addams clan must think outside the coffin to rid Fester of his stubborn new mane.