Dark Shadows - Season 6 Episode 212 DS-675 Necking in the afternoon.
Overview: Carolyn identifies Donna’s body and tells the sheriff that Chris was the last person to see her. The sheriff suspects Chris and takes him in for questioning. Julia and Barnabas remove incriminating evidence from Chris’ cottage. Barnabas tells the sheriff that Chris was will him drinking all night; the sheriff releases him. Barnabas tells Chris that he knows he is the werewolf.