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:―An-An and Yin-Long greeting Thomas.
'''Number One Engine''' is the 1st Episode of [[
W:c:TTTE:Series 22|the 22nd Series]].
* This is the
1st Episode of several things:
1st Episode released under the ''Big World! Big Adventures!'' Re-Brand.
1st Episode that uses [[Set Friendship in Motion#Series 22 Version|the New Intro]] and [[Series 22/Gallery|Outro Titles]].
1st Episode to feature an Onscreen Character (Thomas) as the Narrator.
1st Production since [[Thomas and the Magic Railroad]] to have a First-Person Narrative.
1st Episode that does not take place on Sodor.
1st Episode to take place in China.
1st Episode to feature the New Fantasy Sequences.
** Yong Bao's
1st Appearance in an Episode.
1st Episode since [[Series 12|the 12th Series]] Episode, [[Best Friends]] to have a Running Time of 7 Minutes.
1st Episode since [[Series 20|the 20th Series]] Episode, [[Skiff and the Mermaid]] to be dubbed into German.
* Siu-see Hung and Windson Liong join the Cast.
* At the End of the Episode, Thomas mentions the Events of [[Series 19|the 19th Series]] Episode, ''[[Reds vs. Blues]]'', Stock Footage from Said Episode was also used. Unlike in the Aforementioned Episode, Thomas refers to the Football Grounds as such in the US dub.