Re: In A Mirror, Darkly: Best cold open ever?
"Live long and prosper."
BOOM! [translation matrix = eat
A fan instantly realizes that history is taking another turn. Someone who's never seen any Trek ever, will still want to see what happens next.
Then the new title credits telling us we ourselves are in that universe and this is what we've really been watching for forty years. When they hit on that idea, they really sold the episode. They pull us into it.
Curly: Moe, Larry, the cheese! Moe, Larry, the cheese! (Horses Collars, 1935)