Sir Handel, named after the Skarloey Railway's first owner, Sir Handel Brown I - but previously known as Falcon, after the works where he was built - is a narrow-gauge tank engine.
Sir Handel, named Falcon and under the supervision of Duke in his younger days, has been prone to moody tantrums and thinking that he knows better than others, and at times, is arrogant, pompous, rude, stubborn, naughty, and bad-tempered. When he was given broad wheels which hold well to the rails and has been said to give a smooth ride, this contributed to his arrogant self-importance and his belief that he is a grand engine. He is not known for being a well-behaved engine since he has been known in the past to take a disliking to the narrow gauge coaches (often referring to them as "cattle trucks"), feigning illness to avoid jobs he doesn't want to do, derailing himself and damaging his firebars on purpose, and believing that he should be in charge and he has a tendency to get too big for his wheels. Despite all this, Sir Handel works to get things done and is proud to be a reliable, helpful and good-hearted engine.
Sir Handel can be quite impressionable when it comes to engines who he views as important, express engines, or "the best engines in the world", such as Gordon, Duke or Skarloey. However, when the advice he is given results in him getting into trouble, as shown from Gordon, he can have second thoughts and want to give them a piece of his mind.
However, when he returned in the tenth season of the television series, Sir Handel had been portrayed as a steady, thoughtful and more mature engine who is ready to offer advice. He is ready to be put in charge and keep other engines in order, but ironically regained his original personality whenever this chance occurred. Like anyone else, Sir Handel enjoys being helpful and reliable.
Sir Handel is based on the Talyllyn Railway's Sir Haydn, a Hughes Falcon 0-4-2ST. Albert and Proteus share the same basis. The Corris Railway is currently building another "Falcon" locomotive.
In the Railway Series, Sir Handel was painted dark blue until coming to work on the Skarloey Railway, where he was painted in the Skarloey Railway's red livery with blue-and-yellow lining, and with his name painted on the sides of his saddletank. In the television series, he is painted dark blue with red lining and brass fittings. He has red and gold name and number plates on the sides of his saddletank and coal bunkers respectively.
- Season 100 - Trouble with Brakevans (cameo), Samson's Waste Dump, Coach Brakes, Rheneas' Risky Ride (cameo), Sidney Helps Out (cameo), and Rusty Rescue
- Keith Wickham (UK/US; sixteenth season onwards)
- Naoki Tatsuta (Japan; fourth season only)
- Bunkō Ogata (Japan; tenth - eleventh seasons)
- Shōto Kashii (Japan; sixteenth season onwards)
- Daniel Montoya (Germany)
- Jan Kulczycki (Poland)
- Paul Disbergen (The Netherlands)
- Helge Winther Larsen (Norway; sixteenth and seventeenth seasons only)
- Per Skjøldsvik (Norway; Blue Mountain Mystery onwards, excluding the seventeenth season)
- Miguel Ángel Leal (Latin America; Blue Mountain Mystery onwards)
- Fernando Castro (Spain; Blue Mountain Mystery onwards)
- Prokhor Chekhovskoy (Russia)
- Taisto Oksanen (Finland; Blue Mountain Mystery onwards)
- Keith Wickham gives Sir Handel a Welsh accent.
- In the Railway Series, Sir Handel along with Peter Sam did not have buffers in Duke the Lost Engine and Four Little Engines but later received oval shaped ones by the time of The Little Old Engine.
- Until New Little Engine, his last appearance in the Railway Series, Sir Handel seemed to never have any coal bunkers. His ERTL model also portrays him without coal bunkers.
- The Reverend W. Awdry's model of Falcon was at the Reverend Teddy Boston's Cadeby Light Railway, before the railway finally closed in 2005. It is unknown what happened to it.
- In various merchandise and books, Sir Handel's name is often misspelt as "Sir Handle".
- Despite Sir Handel being a narrow gauge engine, his trackmaster model comes with updated versions of the red branch line coaches which are standard gauge.
- During production on the fourth season, Sir Handel had Rheneas' face and vice-versa.
- Sir Handel's large scale television series model is currently on display in the Hara Model Museum in Japan.
- Nitrogen Studios went to the Talyllyn Railway and took measurements of Sir Handel's basis; Sir Haydn and other locomotives No.1, No.2, No.4 and No.5 so they could make Sir Handel's CGI model for the Skarloey Railway engines return, in the sixteenth season.
- In the Railway Series, Sir Handel only had an open cab on his right side until Great Little Engines, however, in the television series, he has open cabs on both sides.
- Sir Handel has been through many changes through the series. These include:
- Season 10:
- Darker blue livery.
- Black trailing wheels and buffers.
- No visible whistle and his whistle sound changed.
- His smokebox, boiler and saddletanks were raised up and a stand under his smokebox was added.
- His square buffer housings changed to round ones.
- His nose was not as pointed.
- Permanent tail lamp.
- Season 16:
- His blue livery became a more vibrant shade than it was in the tenth season.
- Grey buffers and trailing wheels.
- His buffer housings became square again and more accurate to his basis.
- A visible whistle.
- Dark brass handrails along his saddle tank were added.
- His cutout windows gained brass frames and contained glass.
- His sandboxes gain lids on top and brass 'taps' on the sides.
- His tail lamp was positioned higher and changed to a removable Talyllyn-styled lamp.
- Sanding gear under his cab.
- Rivets were added to his bufferbeam and cab.
- He gained angle brackets on the back of his cab.
- Black siderod guards.
- Brass pipes under his saddletank.
- Season 18:
- Permanent lamp and lamp irons.
- Season 20:
- His trailing wheels and saddle tank hand rails became silver (or more reflective).
- Season 100:
- His cab handrails were changed to match his livery.
- His side rods become silver.
- Season 10: