Doug's Shock Therapy / Doug Is Hamburger Boy - S3-E11
Plot hole: Doug recalls previous years (in a flashback, where he was next to Skeeter at the window of the Honker Burger as they looked outside) of seeing the Hamburger Boy when Mr. Dink is confessing that he *was* Hamburger Boy. However, Doug has only been living in Bluffington for one year - this was his first summer there.
The Blue Lotus: Part 1 - S1-E8
Plot hole: When the Chinese man who visits Tintin goes crazy from the same type of dart that was shot at Doctor Sarcophagus, he tells the guard to go to the Maharajah's son. About 9 seconds later, they are seen bringing the boy back inside. There wouldn't have been enough time for them to get all the way to the ground considering they were a floor above them a few seconds ago. (00:03:05)