The Fred and the Nature Gang/Scooby Doo Hour was a combination of Fred and the Nature Gang and Scooby Doo Where Are You/The New Scooby Doo Mysteries. It first aired on ABC and then aired on Boomerang. They would air an episode of Fred and the Nature Gang and then Scooby Doo! A combination of the credits and intros would also aired. It was the first and only time Hammocks Animation and Hanna-Barbera would work together. Scooby Doo Where are You was succeded by The 13 Ghosts of Scooby Doo on season 2 of the series.
- On the episode Fred's New Yo-Yo/Deserted/That's Snow Ghost had accidentally aired the normal Scooby Doo credits for 5 seconds before switching to the FATNG/Scooby Doo credits
- They would air the New Scooby Doo Mysteries intro and theme when they played episodes of the original show.
- The Fred and the Nature Gang episodes from 1985 premiered on the hour
- Also, the normal FATNG credits never aired on Season 6 reruns. Instead they aired this credits!