Big World! Big Adventures!

'Big World! Big Adventures!' is the 2018 special.

Plot
A racing car called Ace inspires Thomas to become the first engine to travel the world, so Thomas sets off on an adventure which takes him to five continents, across deserts, through jungles and over dangerous mountains. On his journey Thomas meets Nia, an engine who teaches him that everyone needs a little help from their friends.

Characters

 * Thomas
 * Yong Bao
 * Sir Topham Hatt

Hiro,  The International engines and the rest of the Steam Team are likely to appear.

Characters Introduced

 * Nia
 * Ace

UK

 * John Hasler as Thomas
 * Keith Wickham as Sir Topham Hatt

US

 * Joseph May as Thomas
 * Keith Wickham as Sir Topham Hatt

Trivia

 * This special will tie in with the twenty-second season.