Season
- Season 2 1981-09-12
- Season 1 1980-10-04
Episode
- Episode 1: Home Run Rover
- Episode 2: Gator Go-Round
- Episode 3: Playgrounded
- Episode 4: Missy Mistique
- Episode 5: Crazy Daze
- Episode 6: Shuttle Off to Buffalo
- Episode 7: Wish Bones
- Episode 8: Caught Cat Napping
- Episode 9: Wondermutt
- Episode 10: Gone with the Whim
- Episode 11: Dud Boat
- Episode 12: Seagoing Watchdog
- Episode 13: Beach Brawl
- Episode 14: Of Mice and Menace
- Episode 15: Tricky Treat
- Episode 16: Ghostly Goof Up
- Episode 17: A Briefcase of Cloak and Dagger
- Episode 18: Fret Vet
- Episode 19: Bearly Camping
- Episode 20: Tabby and the Pirate
- Episode 21: Gold Fever Fracas
- Episode 22: Police Pooch
- Episode 23: Mush Heathcliff Mush
- Episode 24: Bone to Pick with Marmaduke
- Episode 25: Surburban Cowboy
- Episode 26: A Close Encounter
- Episode 27: Marmaduke of the Movies
- Episode 28: Baby Sitting Shenanigans
- Episode 29: A New Kit on the Block
- Episode 30: Kitty Sitter
- Episode 31: Leapin' Leprechaun
- Episode 32: Clon'en Around
- Episode 33: School Daze
- Episode 34: Caper Cracker
- Episode 35: Cat Kit
- Episode 36: Barking for Dollars
- Episode 37: The Lemonade Kid
- Episode 38: The Great Milk Factory Fracas
- Episode 39: Double Trouble Maker
Heathcliff Heathcliff and Marmaduke Clon'en Around
Heathcliff is an animated TV series that debuted on October 4, 1980. It was the first series based on the Heathcliff comic strip and was produced by Ruby-Spears Productions. It ran until September 18, 1982 with a total of 25 episodes, under two different names.
