Thomas & Friends is a children's television series about the engines and other characters working on the railways of the Island of Sodor, and is based on The Railway Series books written by the Reverend W. Awdry. This was Christopher Skala's last series as executive producer. This article lists and details episodes from the fifteenth series of the show, which was first broadcast in 2011. This series was narrated by Michael Angelis for the UK audiences, while Michael Brandon narrates the episodes for the US audiences.