Freeze Frame: Arnold and Gerald find an envelope in a tree, and the clues lead them on to an investigation in which they believe a man named Marty could be in serious danger. Phoebe Cheats: Phoebe is determined to win a poetry contest, and when she can't think of anything to write, she copies a poem from a book. The statue of Emily Dickinson that she wins for her poem comes back again and again to haunt her.