Series 5 is longer than any of the other series, and contains almost a third of the total number of episodes. The series was made with a view to airing the show in the US, so episodes were shortened to 25 minutes rather than 30 minutes to allow for commercial breaks; and twenty-six episodes were commissioned to tie in with the American tradition of having "seasons", rather than the typical British "series" of six to eight episodes.
Series 5 is longer than any of the other series, and comprises almost a third of the total number of episodes. The series was created with an intention to air the show in the US, so episodes were shortened to 25 minutes rather than 30 minutes to accommodate commercial breaks; and twenty-six episodes were commissioned to align with the American tradition of having "seasons", rather than the typical British "series" of six to eight episodes.