Thomas the Tank Engine Wikia


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This article is about the helicopter. You may be looking for the song, the annual story, or the ancient Sudrian king.
"He may have whirley arms instead of wheels, but he seems to understand just what an engine needs!"
— Duck, All at Sea, third season


Harold is a helicopter who patrols the Island looking for problems.


When Harold first met Percy, he stated that railways were "slow and out-of-date", but was proven wrong when Percy beat him in a race.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.

As of Misty Island Rescue, he has joined the Sodor Search and Rescue team and lives in his own hangar at the Sodor Search and Rescue Centre. Since joining the team he has been involved in a search for Thomas when he got lost, saving Bertie from the Shake Shake Bridge and helping Charlie to recapture an elephant which had escaped from the Sodor Animal Park. Once, Harold's rotors became jammed, so Thomas and Duck took him to the Sodor Search and Rescue Centre.


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.


Railway Series

Television series

He will appear in the nineteenth season.


Magazine stories

Harold also appeared in the magazine stories, Animals, Bright Sight, Come back, Please!, Company for Cranky, Fishy Diesel!, Glider Rider, Harold and Henry, Harold and the Broken Tree, Lost Luggage!, On Inspection, Percy's Plight, Ride and Slide, Sky High!, Smoke Signals, Smoky Sky, Sodor Goes Pop, Sound of Silence, Thomas is Rescued, Steaming Along!, Stone Signal, The Best Band, The Flying Horse, The Great Air Race, The Great Statue Robbery, The Lighthouse Light, and The Trainspotters.

Voice Actors

Theme Instrumental


  • In the second season, Harold's spinning rotors were achieved using a transparent disk.
  • During the third and fifth seasons, Harold's rotor blades were flimsy and they bent a bit.
  • Harold's television series model did not have moving eyes until the tenth season.
  • One of Harold's models is currently on display in Canada at Nitrogen Studios. Another is on display in Japan. 
  • In season twelve, Harold was the only (non-human) character to be fully CGI-animated.
  • In the early seasons, Harold would sometimes be given a searchlight, such as in The Runaway, Thomas and the Missing Christmas Tree, and Thomas, Percy and the Post Train. From the eighth season onward, the light has been added permanently.
  • In the television series, Harold has never had eyebrows.
  • Harold was called Herbert in the French dub of the Classic Series.
  • According to the Sodor Superstars Hall of Fame featured on Percy's Chocolate Crunch and Other Thomas Adventures, Harold has never flown out of Sodor. However, this is now false, as Harold has been seen on Misty Island in later seasons.


"Hello," said Percy "Who are you?"
"I'm Harold. Who are you?"
"I'm Percy. What whirley great arms you've got!"
"They're nice arms!" said Harold, offended. "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!" said Harold in a bored voice. "They're not much use and quite out of date."

- A conversation between Percy and Harold in Percy and Harold, Percy the Small Engine

The engines were just leaving the station, when they heard a familiar buzzing.
"I say you two, there's news flying about!"
"Where?" puffed Percy.
"All over the place. There going to scrap the Post Train and use me instead. Wings work wonders you know! Always!"
"Rubbish!" huffed Thomas.

- Harold boasting to Thomas and Percy,  Thomas, Percy and the Mail Train, third season



Merchandise Gallery

Other vehicles
HaroldBulstrodeP. S. Cumberland RoadS.S. KathrynDignityMermaidNorth StarNancy and Violet
CrankyJeremyColinCaptainOwenMerrickRegS.S. RoxstarTiger MothLucindaThe Queen of SodorA.J.R. No.1Ol' WheezyHee-HawSodor LineHappy HookThe CranesKrystynaG-HewiTugboatsThe AeroplaneThe Salvage BargesThe Canal BoatsThe Mail BoatLakesider IIIThe Fultan FerryThe Tramp SteamerAC.3929The Hot Air Balloon
BluebirdThe Tug BoatThe YachtThe LifeboatsSodor VoyagerS.S. SodorSir TophamSteam BoatThe SeaplaneSodorThe AirshipThe SpeedboatSeaspriteLizzieS.S. Sodor QueenS.S. Sodor SteamlineSodor Harbor

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