Seinfeld - Season 4 Episode 18 -

Jerry, Elaine & George volunteer to help the elderly. Jerry gets assigned to a nasty old man. Elaine is repulsed by the goiter problems of hers and George depresses his charge. Kramer and Newman try the business of selling old records to a used record store. Jerry loses track of his man when they try to take him to the dentist to repair his dentures, after the man had bitten Kramer's arm.