run back to Woodstock's tree where Snoopy sets it back in its proper place. The next day, Sally complains to Charlie Brown that her science exhibit has been stolen. When she reveals that her exhibit was a so-called "prehistoric bird's nest", Charlie Brown puts two and two together and realizes it was she who took Woodstock's nest. Sally claims that the nest had to have been "prehistoric" since the straw was tied together unusually. Even with Charlie Brown's explanation that the nest was made by Woodstock, Sally is convinced that since she found the nest, it belongs to her. When she encounters Snoopy and Woodstock, she demands that they return her nest. The three are about to come to blows when Charlie Brown suggests that they handle the problem in a different way, so they all go to see Lucy in her psychiatric booth, which she temporarily converts to a courtroom enlisting Linus as stenographer, and she tacks two cents on to her normal five-cent fee to cover court costs and asks they pay in advance rather than after. The two sides present their case to Judge Lucy: Snoopy, as Woodstock's attorney, with a document containing excessive legal jargon, and Sally with "Finders keepers, losers weepers". Stenographer Linus is not much help as he can only remember a few words said before the case was fully announced, but Lucy rules in favor of Woodstock, saying that since he built the nest, he should keep it. Lucy's ruling leaves Sally without a science class exhibit, but Charlie Brown and Snoopy come up with an idea. Snoopy is willing to volunteer to be her exhibit in a re-creation of Pavlov's salivating dog experiment. Although Sally disagrees at first, she decides to go along with it and ultimately gets an "A" on her science project. In the end credits, as Woodstock lies on his nest, the bottom falls out, sending Woodstock falling out of his tree. Voice cast Todd Barbee as Charlie Brown Melanie Kohn as Lucy van Pelt Stephen Shea as Linus van Pelt Donna Forman as Peppermint Patty Jimmy Ahrens as Marcie Lynn Mortensen as Sally Brown Tom Muller as Pig-Pen Bill Melendez as Snoopy/Woodstock Peter Robbins (archived) – Lucy van Pelt, Peppermint Patty (screaming only) Music score The music score for It's a Mystery, Charlie Brown was composed by Vince Guaraldi and conducted and arranged by John Scott Trotter. The