Professor Poopsnagle's Steam Zeppelin (aka Professor Poopsnaggle and His Flying Zeppelin) was a popular Australian children's television series which aired on the Nine Network, a spin-off from the 1980 series Secret Valley. It was first aired in 1986 in Australia and also later in Switzerland (TSI) and Finland (1987), Spain (1989, TVE), Greece (1989, ERT), Netherlands (1989, KRO), France (1989, FR3) and Vietnam (1996, VTV3). In contrast to Secret Valley, which was a commercial failure in the United Kingdom when screened there in 1985, Professor Poopsnagle's Steam Zeppelin was hugely successful in the UK, where it was first broadcast in 1987 on the ITV network, and proved so popular that it was also later repeated on Channel 4 in both 1990 and 1998. The series still has a strong cult following in the United Kingdom today. The overall story is divided into 6 parts, each for a particular quest, with 4 episodes each. Some TV channels, such as ITV Anglia, therefore showed the series as TV movies of 90 minutes each. In this form the story is slightly abridged, cutting a few scenes that are present in cut for a half-hour slot. Summary Professor Poopsnagle, the holder of a vital scientific secret, has been abducted and his mysterious disappearance jeopardizes the world of science. His young grandson, who assists him in his research, secures the help of Professor Garcia, a long-standing colleague and friend of the scientist. Assisted by a group of children, spending their holidays in the Secret Valley Camp, Professor Garcia and the young boy build a flying bus. They set off in pursuit of the kidnappers and attempt, at the same time, to complete Poopsnagle's unfinished work. They are helped in their quest by a document that Garcia and the children gradually manage to decipher. But alas, there is a traitor in their midst passing information to the evil kidnappers of Professor Poopsnagle: Count Sator and his accomplice. However, against all odds, and throughout countless and often irresistibly amusing adventures, Professor Garcia and his young group of friends finally win the day. Time after time, the children show great courage and skill. Matt, the traitor, sees the error of his ways and they all live happily ever after.<ref name="Prospectus">{{cite book | title=Text from Professor Poopsnagle's Steam Zeppelin : Prospectus (1986) / Revcom/Grundy Organization}}</ref> Part 1: The stranger arrives Dr. Jose Calandre Garcia had been working on the