The crew of a new paranormal investigation TV series, The Past Hunters, captured a mysterious shadow on the wall at a haunted castle in Staffordshire, England. In the footage, co-director Bex Palmer and medium Derek Acorah are discussing the history of the place when Palmer unexpectedly gasps and gestures toward the wall where a human-shaped figured can be seen. "We normally like to try and debunk things that we see because we still sit on the fence when it comes to ghosts, but we don't think there’s any other explanation for what we saw," said Palmer. Check out the video here.