Caillou was first shown in the episode "Caillou Makes Cookies", which aired in 1997. The first episode aired on Teletoon (both English and French versions) until the fourth season. The series was produced in Canada by the CINAR Corporation, while the fifth and final season was produced with the South African studio Clockwork Zoo. A series reboot was announced in 2023 with a release date set to debut later that year on Peacock with 52 eleven-minute episodes.