He shares the same whistle sound as Duck in nearly all of his roles.
Series 5:[]
He regained his original whistle sound, excluding some scenes in Gordon and the Gremlin and Bye George!.
Thomas and the Magic Railroad:[]
His paint was given a matte finish.
His brake pipe is facing upward again.
He gained red lining on the cab end of his tender.
His trailing wheels moved forward, joining to his driving wheel chassis.
Series 6:[]
The lining on his pistons was moved slightly inwards.
His front left bogie wheel became a 10 spoke type due to being mixed-up with Henry's front left bogie wheel which was on a 10 spoke set. Henry has Gordon's 12 spoke on his front left with a 10 spoke on his front right.
Series 8:[]
His eyebrows become thinner and arch more.
Series 10:[]
The cuts along his cylinders to allow room for the bogey to swivel become much cleaner. (brass model)
His eyebrows change shape completely.
His steam pipes became taller. (brass model)
Series 12:[]
The lining on the cab end of his tender was removed.
His cab has been slightly lowered.
Some of Gordon's faces have been seen mistakenly on Henry in Peter Sam and the Refreshment Lady, Thomas and the Billboard and Heave Ho Thomas!.
Hero of the Rails:[]
The wheels on his bissel truck and tender got larger.
His tender's height got thinner.
Series 13:[]
The middle sections of his driving wheels are painted black.
Series 17:[]
He gained a permanent head lamp and tail lamp.
His wheels are fully blue again.
The Adventure Begins:[]
His side rods become silver.
Series 23:[]
He gains another lamp on his left lamp iron, giving him the BR express headcode for the first time since the fifth series episode, Haunted Henry.
He gains handrails around his cab entrance and on his door.
He gains rivets on his cab, bufferbeams front and sides, the back and sides of his tender, his coupling hook base, around his cab side windows, cylinders, smokebox saddle and around his smokebox.