Joan Bennett VO... she says the ghost is from (over?) seventy years ago, and is vengeful. Welcome, David Selby! He gets two intro moments one right after the other, first from the side-back, and then he steps into camera frame, face fully visible. Maybe they expected us to ooh and ah at the less direct view, then the full view was icing on the cake, too much to expect. Selby towers over the children. Welcome, Terry Crawford and Beth! I remember having a bit of a thing for Beth in her ghost phase as a kid.
David certainly believes that's Quentin's skeleton, and with the telepathy he seems to have with Q, David should know. David sees his father as credulous and easily manipulated, it turns out, in his instructions to Amy. Roger worries about Amy being a bad influence on David! It's as if 1966 never happened... It really, really looked as if Louis Edmonds fell down the stairs. I mean, he was definitely there on the stairs, and went offscreen, downward, so fast that it's hard to imagine that he just ducked. If some show business stunt was prepared, like a big mattress to fall onto, it was still a respectable stunt, and there must have been an edit.