According to IMDB, David Jay did a few acting gigs, the last one in the late 1980s. Not a household name, though.
A lot of dictatorships win because they tell one or two big lies, usually about "us" versus "them," over and over again until people actually believe them. They also make their opponents disappear, either literally or figuratively. Far too many examples in history.
My guess is that Amy got out of the shop when Alexander allowed her to leave and not a moment before. Poor little thing!
I don't think Stokes and Julia have ever not been friends, have they? It's just that Julia has had to put so much work into shielding Barnabas. But they do know how to work together anyway.
While poor Amy waits at the cottage for Chris, someone enters, and she puts her hands up to her face in case she has to start screaming again. Luckily it's Chris, and she throws herself into his arms, but she's still speechless with fright. Julia arrives and sends Chris to find David. Then Barnabas shows up, at his very very worst. He leaves after hypnotizing Amy into forgetting-- well, whatever she saw. Chris returns, and Julia realizes that part of Amy's problem was that she saw Quentin.
Stokes says that Professor Osmund has confirmed that Julia's painting is also a Tate and that Harrison Monroe is alive and living in Cornith (what he says) Bend.
Once again, Barnabas reprimands Alexander and says he's sure that Amy will become one of "us" when she opens the box. Chris brings her back to the Great House, and she finally returns Carolyn's photo to Alexander with a very humble apology as Barnabas beams with approval. (JF is really good at these icky moments. I remember reading somewhere that he told the writers, Don't write the evil. I'll play the evil.)
Julia has found Harrison Monroe’s cottage and knocks on the door. The entrance is so overgrown with shrubbery that at first she doesn’t see the source of the booming, amplified voice that tells her to go away. She looks up to see a huge loudspeaker and tells it, I’ve come to see Harrison Monroe. Dogs bark through the speaker as the voice repeats its command. Julia tries one last time and says, I have a message for Mr. Monroe--from Mr. Delaware Tate. The speaker doesn’t respond, and Julia has just turned away when the front door opens creakily. She enters the house, and the door closes creakily behind her......
[The voice of Harrison Monroe is supplied by [spoiler]Ed Riley, soon to appear as the ill-fated Sheriff Davenport.[/spoiler]