The sixth series of Thomas & Friends was first broadcast in September 2002. Michael Angelis and Alec Baldwin narrated the twenty-six episodes for the UK and US respectively. Angelis also narrated two episodes for the US release of New Friends for Thomas and Other Adventures. Later the narrators re-dubbed six episodes along with music composed by Robert Hartshorne for the US on PBS Kids and the UK for Nick Jr. in 2005.
From September to November 2005, Michael Brandon, Michael Angelis and Alec Baldwin re-dubbed six episodes; No Sleep for Cranky, A Bad Day for Harold the Helicopter, James and the Red Balloon, Gordon Takes a Tumble, Toby Had a Little Lamb and Edward the Very Useful Engine, with music composed by Robert Hartshorne on PBS Kids in the US and Nick Jr. in the UK, to make them series nine-styled when they chose episodes from this series for the airings.