I love the interactions between Carolyn, Julia, and Tony as they wrangle over the notebook. We get Tony in a trenchcoat and fedora (is it a fedora? if it isn't, it ought to be), we've got a beautiful but treachorous dame, we've got the sob story that the treachorus dame tells, and we've got a mysterious older woman, who really should have been using her cigarette-holder to complete the atmosphere. It's all approprate to a good old-fashioned thriller. I just love that the real story is that there's a vampire. A fedora is not going to protect Tony against a supernatural monster.
David has gotten over his fear of Julia, which makes his later - much later - lack of fear of Barnabas more credible: zero attention span.
Julia sure got a bit of her own back today, when she rubbed Barnabas's nose in the fact that Sarah wouldn't talk to him. But why did Sarah then appear to him? If it was to stop him from strangling Julia, then Sarah knew ways of stopping Barnabas short of appearing to him.