Secret Journey of Thomas the Tank Engine

Secret Journey of Thomas the Tank Engine (きかんしゃトーマスのヒミツ旅　誕生70年　世代を超えたおくりもの) is a 2015 Japanese television documentary broadcasted on NHK to celebrate 70 years of the franchise.

Characters

 * Thomas
 * Edward
 * Henry
 * Gordon
 * James
 * Percy
 * Toby
 * Duck
 * Spencer
 * Connor
 * Hiro
 * Diesel
 * Annie and Clarabel
 * Rocky
 * Bertie
 * Sir Topham Hatt
 * Sir Robert Norramby

Interviees

 * Veronica Chambers
 * Christopher Awdry
 * Various children

Footage

 * Thomas and Gordon
 * Edward and Gordon
 * Thomas' Train
 * Thomas and the Guard
 * Thomas, Terence and the Snow
 * Off the Rails
 * Down the Mine
 * Thomas' Christmas Party
 * Thomas Comes to Breakfast
 * A Scarf for Percy
 * Buzz, Buzz
 * Peter Sam and the Refreshment Lady
 * Henry and the Elephant
 * A Better View for Gordon
 * Middle Engine
 * The Old Bridge
 * Merry Winter Wish
 * Thomas' Crazy Day
 * James to the Rescue
 * Percy the Snowman
 * Santa's Little Engine
 * Not So Slow Coaches
 * Spencer's VIP
 * Last Train for Christmas
 * Duncan the Humbug
 * The Perfect Gift
 * Who's Geoffrey?
 * Helping Hiro

Trivia

 * William Middleton's illustrations from The Three Railway Engines are shown.
 * The documentary features some re-created live action scenes of Wilbert and Christopher Awdry in two scenes:
 * Wilbert tells Christopher a bedtime story of Edward's Day Out.
 * Wilbert created a wooden toy for Christopher as a Christmas present, which he names Thomas.