Continuity mistake: When Daryl is driving the hospital van, it shows that he is going to land upside down, on the vehicle's roof, when he drives off the parking garage. In the next scene, the vehicle lands on its wheels, as if it has done a complete front flip. (00:30:00)
Continuity mistake: On the video of Ian supposedly killing Alison, we see her arm fall to the ground with her "Alison" bracelet visible. But in a later scene where Emily watches Ian put his bag in the athletics room, we cut back to the video and Alison's arm suddenly has a sleeve covering up her bracelet. When we see the video again later in the series, her bracelet is visible again.
Continuity mistake: While Stiles and Scott are at the vet getting the black dust, the vet puts the mountain ash on the table and says it's for Stiles. Stiles picks up the bottle and it's in his hand. A shot later the bottle of ash is back on the table, but Stiles never put it down. Then the shot after they show it on the table, it's back in Stiles' hand and he sets it back down.
Continuity mistake: The Duncan family is forced to stay in a hotel while their termite devoured house is fixed. Dad draws up a sketch and is showing it to the family. When he brings his sketch in to show everyone, he is holding a black Sharpie, which then disappears and becomes a yellow mechanical pencil. Then the Sharpie returns for a bit, then changes back into a pencil again. (00:05:45)
Visible crew/equipment: After Kristina explains the lunch problem to Adam, when Adam tells her that he's too busy to call the lunch vendor, in the next shot facing Kristina the T-mark can be seen taped to floor at the bottom, right side of the screen. (00:03:50)
Continuity mistake: After Mike's mother tells him that she heard a prowler, when it cuts to Mike and Carl showing up at her house we see that the window is wide open, but when they move in closer ordering the "sicko" to come out of the hedge, the window is closed as it should be, until Mike's mother opens it when she sees that the "pervert" is actually Kay. (00:00:55)
Continuity mistake: In the second episode Sabrina says the grocery store got bought and it was called "Howdy's" now or something like that (the uniform used to be red and then it was blue with those neck ties). In the episode where Burt, Jimmy and Virginia get kicked out, they visit the grocery store to steal food and they're wearing the blue uniform (as Howdy's grocery store) but it was way before Jimmy had Hope, and Hope was with him when the outfits were red.