KAY'S ADVENTURE; Kay wins a free weekend in Atlantic City and goes to see a famous singer, named Gulliver Dark (Sam McMurry), in concert. TOM NODDY blows unusual bubbles during his segment of bubble magic. CUSTOMS; Sue (Julie Kavner), a USA customs official, meets Kristy McDoon (Tracey Ullman), a Scottish rock singer, and won't let her through customs until she sings a song that Sue wrote for her. THE PERFECT CRIME; After Marge bakes cookies, Bart plans the perfect crime of eating all of them and blaming it on Maggie.