Guest host Cynthia Nixon presents stories by two masters of the form who share an outré sensibility.  Humor, humanity, and fantasy all combine in four tales of things gone wrong.    In “Fly Already” by Etgar Keret, performed by Liev Schreiber, a widower and his small son watch a drama unfold. In “Where Are You?” by Joyce Carol Oates, performed by Dianna Agron, a demanding husband pushes his wife to the limit. In “One Gram Short” by Etgar Keret, performed by Ira Glass, a stoner makes a really bad deal; and Oates introduces an unlikely “Assassin,” in a story that combines tongue-in-cheek horror and political satire.  Becky Ann Baker is the reader.