Continuity mistake: After Spencer is tackled to the ground, his black mask keeps changing positions in every single shot.
Continuity mistake: When Spencer is lying wounded, his head is either surrounded with grass or dirt, depending on the shot.
Continuity mistake: When Rachel's parents drive to Colorado, the co-pilot disappears in the close-up of the driver and the gun next to him.
Continuity mistake: When Rachel is going to Colorado, she holds her phone with one hand. In the close-up, it swaps to both hands and the grip differs.
Revealing mistake: When Rachel sees the burning car, the blatant CGI flames are moving in slo-mo.
Revealing mistake: When Rachel finds the website with the parents trying to find their baby, the text on the page has nothing to do with abductions; it belongs to a personal blog about someone talking about his personality and his mom's.
Visible crew/equipment: When Rachel arrives home in a blue car, the shadow of the filming crew is reflected on its side. (00:41:15)
Other mistake: The same 2 family photographs decorate the family home over and over and over again. Sometimes one or two of the members has been Photoshopped out.
Revealing mistake: When Amy arrives at Rachel's place, a big T-mark is visible on the doormat.
Continuity mistake: The CGI billboard on the lawn moves to the left between shots.
Revealing mistake: When Angela walks on the lawn to meet her husband, she clips through the shadow of the CGI billboard behind. (00:06:39)