Louis C.K. Horace Wittel VIII Actor, Executive Producer Steve Buscemi Pete Wittel Actor Edie Falco Sylvia Wittel Actor Steven Wright Leon Actor Kurt Metzger Kurt Actor Alan Alda Uncle Pete Actor Jessica Lange Marsha Actor Jack O'Connell Dennis Guest Star Conner O'Malley Guest Star Hannah Dunne Guest Star Amy Sedaris Guest Star Laurie Metcalf Guest Star Colman Domingo Guest Star Nina Arianda Guest Star Bill de Blasio Guest Star Angus T. Jones Guest Star Reg E. Cathey Guest Star Karen Pittman Guest Star Blair Breard Executive Producer Dave Becky Executive Producer Vernon Chatman Executive Producer Dino Stamatopoulos Executive Producer