Continuity mistake: When Spark drops the sausages they fall on the ground. A shot later they're inside her kennel.
Continuity mistake: After Molly tries the experiment and takes off her safety googles, they reappear and disappear randomly when she hugs Ed.
End. Begin. All the Same. - S1-E1
Continuity mistake: When Rian and Mira are on the Spy glass, he understands she just invited him to Dreamfast. When she answers "Yes! I mean...if you wanted to?" his hair is suddenly all the way behind the sword's handle, when it wasn't in the shot before. (00:09:45)
Continuity mistake: When Will Parry visits his grandparents, the grandmother is sitting on the sofa next to Will's grandfather. The grandmother's position keeps changing from sitting right next to him to being further apart.