Dark Shadows - Season 9 Episode 32 DS-1012 Necking in the afternoon.
Overview: Barnabas bites William then forces him to destroy the book he was writing. Quentin questions William about Barnabas Collins, then is shocked when Barnabas introduces himself. Barnabas speaks with the ghost of Joshua Collins who is only interested in keeping the family honor. Quentin takes Barnabas to the room in the East wing where they both see Julia in the standard timeline.