Even though Doctor Who is technically a kid’s show,(I know. I don’t buy it either) they often try to push the envelope when dealing with scary imagery and terrifying concepts. It can be a hard balancing act, scaring viewers, while not scaring them away. Series 8 had mummies, cyborg zombies and other scary stuff. Just realize that what we saw on screen could have been so much more terrifying.
This concept art from Millennium FX comes from the Radio Times and it shows us just how much scarier season 8 could have been. If kids do indeed hide behind the sofa while watching Doctor Who, some of this stuff may have had them hiding behind locked doors.