Dave and Seinfeld were hinted in the initial promos and will be on the six-part series, along with Jon Stewart, Sarah Silverman and many other A-list comics, Los Lobos, Weezer, Flea of the Red Hot Chili Peppers, filmmaker John Carpenter, O.J. trial attorney Marcia Clark and others--"John Mulaney Presents: Everybody's in LA" first livestreams this Friday at 10 p.m. ET and all next week through May 10, with Richard Kind as Mulaney's sidekick: