Heathcliff and the Catillac Cats

The Great Tuna Caper [Heathcliff] (1x117)

Air date: Dec 06, 1984

Heathcliff, eating the Nutmeg's out of house and home, is sent out to earn his own tuna money. He lands a job on a tuna boat where he tangles with the bad dog from a nearby pirate trawler who has just stolen their entire catch.