Fabulous scene with Ben and Naomi in the Tower Room, followed immediately by a fabulous scene with Ben and Nathan, followed shortly after by a fabulous scene with Nathan cruelly taunting Naomi about Barnabas.
Barnabas wakens to another night in a shot that later found its way into the "I, Barnabas" video. Unable to help himself, he sends his call to Millicent. No mere lock could keep him in the Tower Room, only the promise to his father, and even that has crumbled in the face of his irresistible, unhuman hunger.
Whoever screamed--whether JB or a stunt screamer--did a really scary job, if I remember.