Continuity mistake: Gary Walsh is holding an iPad with a cell module, a big black bar at the 'top' of the iPad, in landscape with the bar on camera left. During the exchange with Selina, the orientation switches to the right side and back again. (00:00:40)
Continuity mistake: After lying about his wife to Lauren, Ryan shouts after her as she gets in her car. From the back he has a pen and paper in his right hand, but in the front shot the paper has vanished.
Dinner at the Castellanos - S3-E15
Continuity mistake: While Mindy is eating dinner and talking to Dani about getting off gym class, after she mentions the pentagram she puts her knife down and switches her fork to her right hand. The angle changes, and she's holding both items of cutlery in the correct hands again.
The Hand That Rocks the Mabel - S1-E4
Continuity mistake: When Mabel gets back from her date with Gideon, she finds Dipper reading the 3rd journal on the sofa. However, there is a 2 on the book instead of a 3. (00:06:08)