Dark Shadows (1966)

Season 3: Episode 26

Carolyn and Victoria are confused by Willie's recent illness and behavior. Carolyn tries to find out what trouble her mother is in. Willie attempts to leave, but Jason stops him. After dark Willie hears the sound of a heartbeat and knows that something is calling him. Jason sees Willie sneak out of the house and follows him to the graveyard. Willie enters the secret room in the Collins Mausoleum, and Jason is unable to find him.