With a parade of callbacks and a twist a quarter-century in the making, “Curb Your Enthusiasm,” the HBO series starring Larry David as a heightened version of himself, ended its 20-plus-year run on Sunday. The final episode, which referenced the polarizing 1998 finale of “Seinfeld,” David’s previous show, was replete with the usual out-of-bounds commentary and cranky fixation on minutiae; David and his co-stars — Jeff Garlin, Susie Essman, J.B. Smoove, Richard Lewis — do not, by creative mandate, change. (“I’m 76 years old, and I have never learned a lesson in my entire life,” David tells a child in the episode, in the opposite of a teachable moment.) In real life, though, the cast are longtime friends, and have weathered much together, including the death of Lewis, who played himself, in February. These are edited excerpts from the conversation.

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Persons: “, Larry David, “ Seinfeld, ”, David, — Jeff Garlin, Susie Essman, Smoove, Richard Lewis —, ” David, Lewis, Jeff Schaffer, Essman —, Susie Greene, —, Essman, Schaffer, askew, Latte Larry’s Organizations: HBO Locations: New York, Los Angeles