What a Night for a Knight - S1-E1
Plot hole: It seems unlikely that: 1. The curator, who's short and chubby could fit into that suit of armor. 2. How he could be strong enough to lift up the table Scooby and Shaggy are hiding under at one point, 3. That the museum has no security guards who might catch the curator and his thugs during their art forgery scheme and 4. There are eyes shown moving in the suit of armor when the gang's talking to the curator despite the fact he's the Black Knight Ghost.
Plot hole: Given he fell down into a ravine it seems impossible for Carl to have got back to his trailer before Mystery Inc does.
Scooby-Doo and a Mummy Too! - S1-E12
Plot hole: If the guilty man knew the diamond scarab was in the hippo statue then there's no reason he couldn't have broken the statue open and taken it.
Answer: During most episodes of "Scooby Doo, Where Are You?," the gang often split up to explore the latest haunted mansion or abandoned windmill or deserted amusement park. Scooby and Shaggy would generally end up together, Velma would often go off alone, and Daphne would frequently go exploring with Fred. It seemed to be a running theme in the "Scooby Doo" cartoons that Daphne was perpetually flirting with Fred. Fred, however, always seemed much more obliviously preoccupied with finding the next clue, foiling Daphne's amorous intentions. I have always been under the impression that the Scooby-Doo gang was a pretty sexually ambiguous group. More than a few people have suggested that athletic, well-coiffed, ascot-wearing Fred, and bookish Velma were early archetypes of gay/lesbian teens. The show existed in a time when several cartoons suggested sexual ambiguity in its characters: Effete Snagglepuss, a repeatedly drag-wearing Bugs Bunny (who even appeared in TV's first same-sex wedding with phallic rifle-toting Elmer Fudd), prim and polite gophers Mac and Tosh, Peppermint Patty, Marcie, Schroeder and Linus from the "Peanuts" cartoons. But whether or not any then subversive homosexual undertones were ever intended in any of the characters, the oft-paired Daphne and Fred never seemed able to get their relationship beyond the lukewarm stage, much to Daphne's apparent chagrin.
Michael Albert