Maybe the writers did miss an opportunity for a Vicki-Burke-Frank triangle, but I can't imagine Frank being explosive. 

Jason seems to be the brains and Willie the brawn of duo. Maybe Jason talked Willie out of a potentially disastrous situation somewhere back in time, then decided they should team up.

Jason's confederate is first mentiond by name. According to one bit of trivia I picked up somewhere, he was originally going to be called Chris!

Roger is disgusted--and rightly so for a change--when he arrives home and Jason invites him into his own drawing room and offers him a drink.

Jason tries to threaten Elizabeth into giving him "assistance"--that is, an allowance. I refuse to be threatened! she declares, but he is unmoved. Why don't you do it for old times' sake, he suggests.

What a pity that Sam's paintings are apparently lost forever. But Sam has finally come clean with Maggie--and it took us a mere 198 episodes to get there! But [spoiler]we'll have to wait even longer to learn Elizabeth's secret.[/spoiler]

Yeah, loved ’em both! 

David is off on the promised fishing trip with Burke!

Love the very end of this episode! Just as Jason walks easily right past Carolyn and into the foyer, the camera pulls back just enough to let us see a corner of an ornate picture or mirror frame.  Then poor Elizabeth's double-take is priceless!

What fun to watch Jason insinuate himself into Collinwood! He's always been one of my favorite characters. He even left the coffee shop owing Maggie for the two cups of coffee, as well as the $100 he lost on a bet with her.

Poor little David is actually trembling with anxiety at the idea that his aunt Elizabeth might not be well yet.

But once Elizabeth is home, her fear and worry only get worse as she asks Vicki and then Roger whether Dr. Guthrie or anyone else went to the basement. Great scene with Elizabeth and Roger concerning the key! Poor Roger really is all at sea about the change in his sister.

Speaking of Roger and Elizabeth's parents, [spoiler]we will meet their father, Jamison, a long time from now.[/spoiler] But I seem to remember that Roger went to boarding school, as was proper for a young boy of his time and place and social standing. So he probably didn't get much in the way of parental affection, let alone parental hugs. If anything, he most likely regarded his father as a rather distant presence. If so, it's certainly no wonder he has trouble relating to David.

Somebody probably has already posted this, but here's the NY Times obituary.

David Selby's "Letter to Jonathan" is a lovely and touching piece of writing.

Still can't believe it--and I didn't even start watching till the reissue on public TV here in the 1980s!