Caillou is a 2005 English-language Animation Family series developed by H l ne Desputeaux and Christine L'Heureux. The show was Produced by James Fonda and Winston O'keefe under the banner of Dariell Productions in collaboration with Screen Gems and Hank Ketcham Enterprises. Based on the books by Helene Desputeaux, it focuses on a four-year-old boy named Caillou who is fascinated by the world around him. Caillou stars Evan Smirnow in the lead role along with an ensemble cast including Ellen David, Jennifer Seguin, Merlee Shapiro, Pat Fry, Annie Bovaird and Jesse Vinet. The series is based on Caillou by H l ne Desputeaux. The music was composed by William Loose along with John Seely. The series has a running time of 22 minutes for each episode. The show has a total of 92 episodes during it's run of 5 seasons. Distribution rights for the show were acquired by Screen Gems. Based on the books by Helene Desputeaux, it focuses on a four-year-old boy named Caillou who is fascinated by the world around him.