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 A Close Encounter
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.
