Welcome back to Lanford, David.
After so many years of getting used to The Big Bang Theory's Leonard Hofstadter and Leslie Winkle, it sure did feel a bit weird to return to the origins of Johnny Galecki and Sara Gilbert's onscreen relationship on Roseanne.
David first announced his return to his daughter, Harris, who smashed a bunch of cakes in the grocery store after getting his text. She didn't believe him, but he wasn't lying. He later crawled through Darlene's window just like old times, though he had apparently lost his upper arm strength due to veganism.