Once again, Thank you! to WP for making this so easy.
I guess this episode is where this period of Dark Shadows starts to split off into two completely distinct storylines - the Jason Plot and the Barnabas Plot - and it's only very rarely that the two meet in any way. One of the things I love about later Dark Shadows is how different subplots collide and affect each other, and I wish it had happened here.
The whole long scene in the Blue Whale was very soapy. Nancy Barrett acted it well, and I suppose it was a necessary wrap-up to a storyline (the sort of thing that was occasionally skipped later in the series), but if this had been the first Dark Shadows episode I ever saw, it would probably have been my last. I've never seen any episode before #210, though, and I daresay I'd feel differently about the Blue Whale scene if I'd seen the lead-up to it.
Jason and Elizabeth are still fun to watch, and I agree with everyone who would have liked to see Dennis Patrick and Joan Bennett play a couple.