Dark Shadows: The Haunting of Collinwood - DVD - new

This TV Special uses a collection of scenes from the original TV show to put together the story of how the ghost of Quentin Collins haunted the eerie estate of Collinwood. 

Another way to describe it: "Barnabas Collins and Dr. Julia Hoffman attempt to uncover the mysterious happenings at the haunted Collinwood estate when the children become possessed by an evil spirit."