Continuity mistake: The table outside the train, where Hercule and Ms. Debenham were sitting at with the coffeepot and cups, is missing when they stand up and return to the train.
Continuity mistake: When Cory is following the lions' traces he gets off the sled with gloves on, then he makes the gesture of taking them off (not actually showing). The close up shows him with no gloves on, then wearing them, then not wearing them. (00:12:00)
Continuity mistake: On the third and fourth day, Carter's roommate shows up earlier than the first 2 days. And Tree's suspect tips notebook every day don't reset and the line and erases are the same.
Continuity mistake: When Logan is shown the message found on the second victim, the string in the evidence bag attached to the note changes between the close up and the far shot. (00:28:30)
Continuity mistake: When Shawn first holds up the jerky to distract the guard dog, he's holding the torch in his right hand and the bag of jerky in his left. We cut to a wider shot and the items have instantly switched hands. (00:26:50)
Continuity mistake: When the cover is replaced on the well it is placed slightly off centre. When the angle changes the cover is now placed perfectly. (01:14:00)
Continuity mistake: Gardner Lodge is eating his sandwich and talking to his son. The level of milk in the glass is different when the camera angle changes from behind Gardner to behind his son.
Continuity mistake: There's a vase of yellow flowers to the right of the helium "Happy Birthday" balloon (and screen). When Ashley gets up to answer the door, she walks past the balloon and the vase of flowers should be visible but is not. (00:01:40 - 00:02:28)
Continuity mistake: Charlie was standing in the hole he dug and his head was below ground-level, but when Eliza was talking to him, Charlie's head was above-ground. Half of Charlie's back was above-ground when his mother [Toni Collette] was outside. Front views of Charlie standing in the hole still showed him against dirt (head below surface-level) even after he was just shown with his head above-ground. (00:51:10 - 00:51:46)
Continuity mistake: Maggie gets downstairs while Henry and her daughter are playing with their phones. The hair goes in front and behind her right shoulder depending on the camera angle. (00:03:00)
Continuity mistake: The rememory recording headpiece has a single button on only one side, which lights up when activated. While Sam is with Todd he listens to Todd's history, and when Sam activates the device he holds the headpiece out for Todd to "prove it." In the first shot Sam's holding the side with the lit-up button, but in the next shot the headpiece is turned the opposite way, with the lit-up button facing Todd as Sam's holding the other side of the headpiece. (01:10:35)
Continuity mistake: Addison put his sweater on (over his neck and arms into the sleeves). After his dad asked him if he was OK, the view of Addison in the mirror showed him putting his sweater on again. (00:16:04)
Continuity mistake: In the opening walk to the London meeting she walks by a parked blue MGB GT (reg E55...) twice on different roads, and then it passes her as well.