Grandpa and the Great Cyclic Harmonium Swindle
- Episode aired Nov 9, 1974

Two con men convince Jeff to pay them $750 to promote his inventions. Ben, Kathy, and Danny concoct a plan to get the money back.Two con men convince Jeff to pay them $750 to promote his inventions. Ben, Kathy, and Danny concoct a plan to get the money back.Two con men convince Jeff to pay them $750 to promote his inventions. Ben, Kathy, and Danny concoct a plan to get the money back.