The Little Rascals S04E10 - Thundering Fleas

Farina is watching Professor Clement's flea circus with his dog, Magnolia, when a flea decides to stowaway on the pooch. The professor offers a dollar to the gang if they can find the flea. They have to eventually attend the wedding of Mary's sister, though, which turns into an itching frenzy as Magnolia walks among the guests.