This 30-minute Saturday morning cartoon was produced by Ruby-Spears Productions and aired a total of 26 episodes. The first season, called "Heathcliff and Dingbat," ran for 13 episodes and included backup segments with Dingbat and the Creeps (who were created specifically for this show). The second season, called "Heathcliff and Marmaduke," ran for 13 episodes and featured backup segments with fellow comic strip character Marmaduke.
| Season | From | To | Episodes |
|---|---|---|---|
| All Seasons | |||
| Specials | 0 | ||
| Season 1 - Heathcliff and Dingbat | October 1980 | December 1980 | 52 |
| Season 2 - Heathcliff and Marmaduke | September 1981 | December 1981 | 39 |
| Unassigned Episodes | 0 |
| Season | From | To | Episodes |
|---|---|---|---|
| Unassigned Episodes | 91 |
| Season | From | To | Episodes |
|---|---|---|---|
| Season 1 | 0 | ||
| Unassigned Episodes | 91 |
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