Professor Poopsnagle's Steam Zeppelin season 1 episode 2
Dr. Jose Calandre Garcia had been working on the theory of Mega- steam when he lost contact with his old friend Professor Poopsnagle. Determined to continue the work that Poopsnagle had originally begun, Garcia traveled to Australia in a hot air balloon in search of his old friend. Unbeknown to him, however, the wicked Count Sator had discovered his plan and sent his henchman Murk to shoot down the hot air balloon. Murk shot down the balloon, but the old doctor survived the crash and was rescued by some young children from a holiday camp in Secret Valley. When they heard the doctor's story of why he had come to Australia, they decided to help him in his quest to find the 6 minerals of Megasteam.
Funny extra detail: for some reason it was also very popular in Vietnam and Holland. And Spain, because of the professor character who was a Spanish actor. And some clips in French. When it was still 2/3rds on youtube, there were many Spanish, Dutch, and Vietnamese comments. That also explains why some Secret Valley episodes have Dutch subtitles. Cheap Russian dubs of SV also exist.
None of that is helping you see it, but still. It had clout around the world.