S5·E37 Borrowed Book
Aired October 9, 2010
Synopsis
Miss Martin agrees to loan Caillou a preschool book, as long as he promises to take good care of it. Caillou agrees, but when he returns home he soon realizes the book is gone. Oh no! He lost it! Feeling badly, Caillou goes to great lengths to recreate the book only to find out he left it in the preschools playground.