Poor NB now has a cast on her arm, from an accident, apparently. We'll be seeing it for a while, I'm afraid.
Apparently the study is still located somewhere under the stairs--at least it is if Jason came directly from the study to meet Carolyn in the foyer.
Jason opens the Locked Room and turns on an overhead light--but would the bulb still be good after 18 years? Or was it one of Matthew's tasks to make sure there was a working bulb in the fixture so Elizabeth wouldn't have to wallow in guilt in the dark?
When he comes back to Elizabeth, we have an awful, awful moment when she asks him, Do you want me to give the key to Carolyn now?
And then of course, she drops the bomb on Carolyn, Roger, and Vicki....