Heathcliff and the Catillac Cats - Season 2 - Eps 39: The New York City Sewer System
The Nutmeg travel to New York for a vacation. Grandpa spins a yarn about how it's rumored there are alligators living in the sewer system and whoever could capture one would be a hero. While visiting a museum, Grandpa leaves Heathcliff with the hatcheck girl...but not for long. Heathcliff soon escapes and before long he's down in the sewers beneath the Big Apple, searching for an alligator. When he actually runs into one the episode turns into a wild chase in the sewers as cat and reptile clash in a titanic battle.
About Heathcliff and the Catillac Cats

Title: Heathcliff and the Catillac Cats
First Air Date: 1984-09-17
Last Air Date: 1985-10-07
Status: Ended
Rating: 6.3/10 (from 48 votes)
Language: EN
Seasons: 2
Total Episodes: 172
Network: Syndication FR3
Genres: Animation, Comedy, Kids
Production Companies: ICC TV Productions, DIC, DiC Entertainment
Cast

Mel Blanc
Heathcliff (voice)

Donna Christie
Cleo / Iggy (voice)

Peter Cullen
Pop / Max (voice)

Jeannie Elias
Jeannie Elias (voice)

Danny Mann
Hector (voice)

Marilyn Lightstone
Sonja (voice)