. The episode clarifies that Rick C-137 didn't just pick a random universe to live in; he specifically moved into the home of the Rick who murdered his family, hoping to lie in wait for his return. This also means that Rick C-137 is not Morty's biological grandfather—he is the grandfather of Morty's original, killer Rick.
“So for the first time? No portal. No tether. No ‘season premiere reset button.’ I’m taking a real car. I’m driving to a real diner. And I’m going to eat a real pancake, alone, for about forty years.”
“No,” Morty said.
The room went silent. Space Beth uncrossed her arms. Jerry’s mouth hung open. For once, no one had a quippy retort.