The new series is a term used for the seasons of Thomas and Friends produced by HiT Entertainment between 2004 and 2008. Season 8 introduced many new changes to the series: the new title sequence featured a new theme tune based on the song Engine Rollcall; the series featured newer models with different paintwork, new facial expressions and more dynamic camera work; the episodes became longer, being seven and a half minutes long; and the series, when aired on television, was often split into thirty-minute blocks with three episodes, educational puzzles and songs and "Engine Rollcall" played at the end.
The new series was a big change from the classic series and often included recycled plots, such as Henry again requiring "special coal", and the engines appearing to possess the ability to move without a crew. The series also introduced more female characters, which the classic series was criticised for the lack thereof.
Starting with season 12, CGI elements were added to the new series in the forms of people, animals, Harold, and the engine's faces. Starting with Season 13 the series was rendered in CGI completely.