Dark Shadows - Season 12 Episode 45 Necking in the afternoon.
Overview: Julia discovers that Catherine is going to have Bramwell’s child and that Morgan has locked Catherine in with Bramwell. Catherine becomes possessed and tries to kill herself, Bramwell stops her. Bramwell is choked by an unseen force, but he recovers. As morning approaches Morgan goes to open the room, with a gun; if they have survived he plans kill them.