King Ottokar's Sceptre: Part 2 - S2-E5
Continuity mistake: When Tintin is in the car with the singer, there is a man next to her. He's wearing a red jumper, but it disappears about 30 seconds later. (00:25:30 - 00:26:05)
Bug Off/The Crawl Space - S9-E5
Continuity mistake: In Moving Away, Tommy tells the other Rugrats how they first met when Angelica lied about the nasty things they did. However in the Crawl Space, there is a flashback of Tommy, Chuckie, Phil and Lil playing in the playpen when they were younger. Chuckie is scared of the Jack-in-a-box in that flashback, so the Rugrats could not have met for the first time back then.
Continuity mistake: When Marshall first finds Trip's letter, he holds it from the left side. In the close-up, he's holding it from the right side. (00:02:10)