Heathcliff and the Catillac Cats

Meow Meow Island [Heathcliff] (1x25)

:

During an afternoon of deep-sea fishing, Heathcliff and the Nutmegs land their boat on a small island for a picnic and soon learn the island is inhabited by a tribe of wild cats called Meow Meows. These savages capture the Nutmegs, but Heathcliff cleverly rescues them from being sacrificed in a native ritual.