

Three teenagers and their dog solve mysteries with the help of two ghosts from the 18th century.

When a gang learns that a farmer may lose his farm, they decide to enter the Looney Dooney in the race, and donate the prize money to him. They convert the vehicle into the Monstermobile. But that night, a criminal called the Raven steals it to keep them out of the race. They go to an abandoned saw mill to get it back. After Mudsy rescues them from a near-fatal ride to the grindstone, they recover the Monstermobile, enter the race, and win. They discover that Raven is Otis Carter, the bank president who wanted to foreclose on the farm.
Aired: 9/11/1971
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The group stops at Conway Manor when the Looney Dooney is stuck in a bog. They discover that Mike Conway is being threatened by a Marsh Monster.