The 23rd series of the children's television show Thomas & Friends is the 2nd series of the Thomas & Friends: Big World, Big Adventures! part of the Thomas franchise. It began airing on 2 September 2019 in the UK, and first aired on 18 May 2019 in the US. It consisted of 20 11-minute episodes as well as three 20-minute specials. The series is once again, divided into two halves: one half with Thomas travelling around the world, and one half taking place on the Island of Sodor. Along with more episodes set in the previously visited China, India and Australia, Thomas also visited two new countries (Italy and Brazil). This is also the last season to air on Nick Junior in the US, with 2 specials aired on Nick Jr. except 1 special.
Keith Wickham as Gordon (UK), Edward (UK), Henry (UK), Glynn, Den, Norman, Harold (UK), Bertie, Skarloey, Sir Topham Hatt, the Bird Watcher, the Grumpy Passenger, Passenger, the Great Railway Show Judge, a Child (US/UK), Some Children (UK), some Passengers, and some Workman
Kerry Shale as Gordon (US), Henry (US), Diesel (UK/US), Harold (US), Kevin (US), Max (US), and the Troublesome Trucks
Teresa Gallagher as Emily (UK), Annie and Clarabel, Belle, The Lady in Yellow Dress and Hat, The Teacher, Albert's Wife, The Lady in Blue Dress, Some Children, School Girl with two curly ponytails, The Ginger Haired Boy, Brenda, and The Sodor Rangers (US/UK)
Jules de Jongh as Emily (US), Some Children (US), and Caitlin (UK/US)
Rob Rackstraw as James (UK/US), Toby (UK), Stanley, Owen, the Man with Green Waistcoat and Grey Hair, The Crown Thief 2 (US/UK), a Passenger (UK/US), Monty (US), and the Troublesome Trucks
