The fifth episode of this season of Curb Your Enthusiasm opens with a dedication to the late Richard Lewis, the great comedian and Larry David’s best frenemy, both on- and off-screen. Throughout his stand-up career, Lewis perfected the art of dark comedy, mining his own experience as a drug-and-alcohol addict for gems of comic insight. Richard’s grace, warmth, and sense of dark humor really shine in this episode when he catches Larry picking up Irma at a local AA meeting, where he managed to crack up the whole group. “You should’ve seen me today,” Richard tells Larry. “I got laughs bigger than I’ve ever gotten before at a meeting.” And it’s true; several people interrupt the conversation to congratulate Richard on his “performance,” during which he uses his signature “……