Legendary chanteuse Lena Horne and Grover perform a duet about not being shy; "Monsterpiece Theater" presents "Ali Baba and the 40 Thieves"; the classic "Plants Need Water" and "The Invention of the Raisin" animations; Placido Flamingo stages an opera; Kermit the Frog reports on the Three Little Pigs live for "Sesame Street News"; Soap opera spoofs of "All My Children" and "Another School."