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"Stupid thing. Why can't it go and buzz somewhere else?"
— Percy, Percy the Small Engine

Harold is a helicopter who patrols the Island of Sodor, searching for emergencies.


When Harold first met Percy, he stated that railways were "slow and out-of-date", but was proven wrong when Percy beat him in a race. When Thomas' brakes failed while boarding at a station, with an inspector Harold chased him down the line. Christmas that year Harold brought Santa Claus to the party at Tidmouth Station. Harold also dropped hot drinks for Percy's crew when they were stranded in a floating river and made friends with Duck after rescuing an injured sailor.

Harold lives at Toryreck airfield (Dryaw in the television series) by Thomas' Branch Line. He keeps a watchful eye over Sodor in case of trouble and speeds to the rescue of anyone in distress.


Harold speaks in a manner reminiscent of an RAF pilot, using terms such as "wizard" and "old chap" in conversation.

Harold somewhat tends to be full of himself as he feels that "railways are slow", but he always gets his comeuppance in the end.


Harold is based on a Sikorsky S-55 helicopter, built in the UK as the Westland Whirlwind. He has added floats.


Harold is painted white with red lining.


The Railway Series

Television series


Voice Actors

Theme Instrumental




"Hello. Who are you?"
"I'm Harold. Who are you?"
"I'm Percy. What whirley great arms you've got!"
"They're nice arms. I can hover like a bird. Don't you wish you could hover?"
"Certainly not! I like my rails, thank you."
"I think railways are slow. They're not much use and quite out of date."

- A conversation between Percy and Harold in Percy and Harold

"Bother! It's that dizzy-thing, Harold!"
"Good morning! I always said railways where out of date, but you're so slow with the post, you should give everyone their stamps back post-haste!"

- A conversation between Harold and a behind-schedule Percy in Thomas, Percy and the Mail Train

"Harold told me you where uh.....a wizard. He told me he can beat you at somethings but not at being a submarine. I honestly don't know what you two get up to sometimes but I do know you are a really, useful engine."

-Sir Topham Hat, after Percy taking a swim in Percy's Promise.


Other vehicles
HaroldBulstrodeP. S. CumberlandS.S. KathrynDignityMermaidNorth Star
CrankyS.S. RoxstarLucindaTiger MothThe Queen of SodorThe CranesTugboatsThe AeroplaneThe Salvage BargesThe Canal BoatsThe Mail BoatThe Paddle BoatThe Fultan FerryThe Tramp SteamerThe Hot Air Balloon