1. KNOTS LANDING - Valene's complete Knots flashback.
Gary's Tidal Dream is over and he lost the ranch. The black sheep Ewings are back to square one and move into their house in the cul-de-sac.
Valene herself hasn't been away that long but now they're going to re-inhabit the house - Miss Ellie's gift - as a couple (and the kids,of course).
She opens the door and looks into the empty living room which triggers a flashback of her and Richard and the famously missing light bulb.

She goes from room to room and there's audio flashbacks of her and Gary and Lilimae etc.
Her history is
our history and I think that's what makes it so special.
2. DYNASTY - Fallon dreams of Roger Grimes
I think this was the first time that a male Dynasty character was portrayed as a
sexual danger. And there's so much Freudian subtext of her replacing her mother eventhough she wasn't aware of it at the time she had those dreams. Eventually she'd go back to her The Colbys "don't make me remember!"-mode, but the Roger Dream was very enchanting.
3. DALLAS - Sue Ellen remembers what started the fire at Southfork

A Happy Wedding card in the hospital gift shop triggers a flashback memory of her being drunk and burning John Ross and Pamela's happy wedding invitation.
What makes this flashback so different is that it's filmed from a drunken point of view, the hazy scenes are exactly how she experienced it - and it was also an interesting not-dunit.
4. THE COLBYS - Sable's nightmare
I could call it camp but I think it's more than that because it looks like an intentional parody of the glossy 1950s melodramas.
The visuals and even the vocals are particularly zany, maybe there's a name for this kind of comedy.
"My house...my house..."
But that's the whole point, Sable. It's not
your house.
5. KNOTS LANDING - Valene's nightmare
"Hiiiii! I think you got something that's mine"

This is an equally absurd, almost child-like dream. Gary is a person without free will, he really
belongs to Abby.
Abby isn't hostile, she's as cuckoo as the Queen Of Hearts, nevertheless she's disturbing Valene's romantic fantasy.

The scenery looks weirdly fake as they walk away into nothingness.