The Hood aka Belah Gaat

The Hood, who was never actually given a name (or even called the Hood) in the series or movies, is a mask-wearing master of disguises and at various times an agent, a baddie-for-hire, a man who wants the secrets of International Rescue for his own gain and an independently wealthy bad guy. He lives in a temple in the Malaysian jungle. This recurring arch enemy to International Rescue was voiced by actor Ray Barrett, who also voiced John Tracy.

Here is a table of Canon Foundry facts about the Hood:

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From the TV Series and the Movies (Thunderbirds Are Go and Thunderbird 6):

The Canon Fact	The Source
Refers in Kyrano as his brother	Trapped in the Sky
Refers to Kyrano as his half-brother	Desperate Intruder
Can make Kyrano tell him things (Trapped in the Sky) or do things at his command (Martian Invasion) using a combination of hypnosis and telepathy.	Trapped in the Sky and Martian Invasion
Sometimes seems motivated by revenge against International Rescue, sometimes works for money (in pay of ‘General X’)	Martian Invasion and Edge of Impact
Can fly light aircraft (albeit with some difficulty)	Martian Invasion
Right-handed	Shoots with his right hand in The Mighty Atom
Can operate a small submersible/submarine and is also a capable diver	Desperate Intruder
Interestingly, International Rescue never actually checks to be certain whether he's alive or dead, whenever he is "brought down."	When Parker shoots his car off the road in Trapped in the Sky / When he flies a plane into General X's house in Martian Invasion / When he goes off a cliff in Australia in Cry Wolf / When Gordon disables his submersible in Desperate Intruder / When Parker shoots his aircraft down in Thunderbirds Are Go
Does not appear in Season 2 of the TV series	Season 2 of television series
Other Sources:
THE HOOD - Half brother of Kyrano and arch villain of the series. Named the Hood because he dons many disguises.	Thunderbirds Information Sheet
Although the Hood was never known by name to the Tracys or their friends in the series, his name was known to viewers right from the start as it was given in the ‘cast list’ for Trapped in the sky in the TV Times	TV Times, Sept/Oct 1965; dates vary according to region
He was also referred to as the Hood in Introducing Thunderbirds that was released just prior to the first broadcast of the series in September 1965. In this story, Jeff is showing Lady Penelope around the island, and she asks “Who else knows about International Rescue?” Jeff replies “There was a suspicion that a character based in the Far East knew something of the set-up; he goes under the melodramatic name of 'The Hood'. If he is aware of the organisation's existence, he's keeping it to himself. So far our security has been 100% on the ball.”	Introducing Thunderbirds, Century 21 EP mini-album (MA103)
A shrewd villain dedicated to uncovering the secrets of International Rescue.	ITC Programme Notes
He can never be recognised as he wears a series of masks.	ITC Programme Notes
An exotic Eastern temple serves as his hideaway.	ITC Programme Notes
Kyrano is his half-brother.	ITC Programme Notes
His first appearance in the TV21 comic is facing Lady Penelope in her own series. Issue #44 (20th Nov 2065; ‘The invisible ray’) introduces her Ladyship to both The Hood and Jeff Tracy.	Lady Penelope, The Elegance, Charm and Deadly Danger, Century 21 Comic, dateline 23 January 2065 (1965)
His first appearance in a Thunderbirds story is in issue #73 (11th June 2066: ‘Atlantic tunnel’)	Fennell, Alan, Editor, June 11, 2066 (1966), TV Century 21, Century 21 Publishing Ltd.
The arch villain with the reputation as the world’s most dangerous man gets his name from his many disguises.	(1966), Thunderbirds Annual . City Magazines Ltd. p.13
Wields an uncanny, supernatural power over his half-brother Kyrano.	(1966), Thunderbirds Annual . City Magazines Ltd. p.13
Physically unlike his half-brother, being ‘gigantic in stature, with a muscular build’ and an evil face.	(1966), Thunderbirds Annual . City Magazines Ltd. p.13
He normally works alone from his secret base in an old Malaysian temple, but occasionally employs servants from the criminal ranks and dregs of society.	(1966), Thunderbirds Annual . City Magazines Ltd. p.13
Ruthless and calculating, he uses Voodoo and Black Magic to control other people, holding everyone else in contempt.	(1966), Thunderbirds Annual . City Magazines Ltd. p.13
His chief target is International Rescue; the plans of the Thunderbird machines would give him both money and power.	(1966), Thunderbirds Annual . City Magazines Ltd. p.13
Blackmails characters who he suspects may betray him.	(1966), Thunderbirds Annual . City Magazines Ltd. p.13
Has a complete disregard for anybody but himself.	(1966), Thunderbirds Annual . City Magazines Ltd. p.13
The most wanted man on Earth.	(1967), Thunderbirds Annual, City Magazines Ltd. pp. 62-63
In his secret temple hideout, a statue of an ancient rain-god, half-man, half-serpent, conceals the entrance to the Hood’s secret laboratories. Here intricate devices that enable him to evade security systems give evidence to his skill as a scientist.	(1967), Thunderbirds Annual, City Magazines Ltd. pp. 62-63
On another wall of the temple a concealed switch on the paw of one of a pair of oriental guard dogs opens a section of wall to reveal a flight of steps leading down to the room where the Hood keeps all his masks, which number in the thousands. The master criminal makes these himself, based on photographs.	(1967), Thunderbirds Annual, City Magazines Ltd. pp. 62-63
Beneath the rear of the temple lies a hangar where the Hood keeps a car and helijet. The car, a rocket-powered Mogul saloon, has been adapted by the Hood until it can achieve speeds of up to 80mph above the standard model. His atomic powered helijet can fly at speeds over 3,000mph and has been fitted with devices to help him evade being tracked by police.	(1967), Thunderbirds Annual, City Magazines Ltd. pp. 62-63
Kyrano is the Hood's half-brother, but there any similarity ends.	(1967), Thunderbirds Annual, City Magazines Ltd. pp. 62-63
Kyrano is as honest as the Hood is dishonest.	(1967), Thunderbirds Annual, City Magazines Ltd. pp. 62-63
The Hood wields a commanding power over Kyrano, and this is centered around a huge, glass-sided cabinet containing a life-sized dummy of Kyrano which the Hood concentrates his thoughts on to place Kyrano into a hypnotic trance, even though he may be thousands of miles away.	(1967), Thunderbirds Annual, City Magazines Ltd. pp. 62-63
If the World Police could destroy the Hood and his temple, their job of destroying organised crime would be more than halved.	(1967), Thunderbirds Annual, City Magazines Ltd. pp. 62-63
The Hood names himself to Lady Penelope.	Theydon, John (1966), Calling Thunderbirds. Titan Books Ltd. p.32. ISBN 1-85286-161-4
The Hood talks of his influence over Kyrano, though does not specify their relationship.	Jennison, John W. (1966), Operation Asteroids . World Distributors (Manchester) Limited. p. 80.
Uses his hypnotic powers to bend others to his will.	Peel, John (1988) Supermarionation: the Magical World of Gerry Anderson . "Kyrano," Los Angeles, California; Schuster and Schuster
His frustrated attempts to gain IR’s secrets have turned his original aim to gain their secrets into a personal vendetta, which must end in his own destruction, or that of the Tracy family.	Peel, John (1988) Supermarionation: the Magical World of Gerry Anderson . "Kyrano," Los Angeles, California; Schuster and Schuster
Lives in a temple dedicated to a god long forgotten even in the mythology of the surrounding native tribes of Malaya.	Peel, John (1988) Supermarionation: the Magical World of Gerry Anderson . "Kyrano," Los Angeles, California; Schuster and Schuster
Is a man without either morals or scruples.	Peel, John (1988) Supermarionation: the Magical World of Gerry Anderson . "Kyrano," Los Angeles, California; Schuster and Schuster
To the Hood, there is no one worth allegiance and he sells his services to the highest bidder.	Peel, John (1988) Supermarionation: the Magical World of Gerry Anderson . "Kyrano," Los Angeles, California; Schuster and Schuster
In attempting to steal the secrets of Zero-X, he was shot down in a helicopter by Lady Penelope. It is not known for certain whether he perished in this or not.	Peel, John (1988) Supermarionation: the Magical World of Gerry Anderson . "Kyrano," Los Angeles, California; Schuster and Schuster
'Our cast of regular players was beginning to come together but no drama would be complete without the arch villain. Thus the Hood was created and became the character that everyone loved to hate. A master of disguise, with an almost psychopathic hatred of International Rescue, he featured heavily in the opening episodes, but never really seized the imagination of the audience - at least not nearly as much as we had hoped.'	Anderson, Sylvia. Yes, M'Lady. Smith Gryphon, 1991 ISBN 1856850110 pp. 24-25
'Some characters in the series inevitably worked better than others and account for there being, in later episodes, less of the Hood and less of Kyrano, both of whom turned out to be less viable on the screen than on the page.'	Anderson, Sylvia. Yes, M'Lady. Smith Gryphon, 1991 ISBN 1856850110 p. 26
‘A huge man’	Marriott, John (1992), Thunderbirds Are Go! . Boxtree Limited.
‘Gigantic in stature’.	(1992), The Official Thunderbirds Annual . Grandreams, Ltd./ITC Entertainment Group. p. 14. ISBN 0-86227-953-4.
Date of birth 17th July, aged 47	(1992), The Official Thunderbirds Annual . Grandreams, Ltd./ITC Entertainment Group. p. 14. ISBN 0-86227-953-4.
The Hood is given the name ‘Belah Gaat’.	Fennell, Alan, "The Complete Thunderbirds Story,” Thunderbirds: The Comic #58 onward, 1993 - 1994, Fleetway Editions, Ltd., ITC Entertainment Group, Ltd.
He first encounters Jeff when the latter crashes his plane in the Malaysian jungle. The Hood finds out Jeff’s identity from papers in the wreckage and gets Kyrano to nurse him back to health, knowing a man of his influence will be of value.	Fennell, Alan, "The Complete Thunderbirds Story,” Thunderbirds: The Comic #58 onward, 1993 - 1994, Fleetway Editions, Ltd., ITC Entertainment Group, Ltd.
‘Massive in stature,’ the Hood’s main aims in life are the acquisition of wealth, regardless of justice or ethics	Bentley, Chris (2000), The Complete Book of Thunderbirds. Carlton Books, Ltd.. p. 61. ISBN 1-84222-092-6.
Born 17th July 2018	Bentley, Chris (2000), The Complete Book of Thunderbirds. Carlton Books, Ltd.. p. 60. ISBN 1-84222-092-6.
His main aim in life is the acquisition of wealth regardless of justice and ethics.	Bentley, Chris (2000), The Complete Book of Thunderbirds. Carlton Books, Ltd.. p. 60. ISBN 1-84222-092-6.
Uses masks made of Bondaplasma, cast directly from victims or sculpted from photoscans.	Levene, Lesley, Editor (2000), Thunderbirds Annual 2001 . Carlton Books Ltd. p. 18.
His secret hideaway contains a laboratory complex and a hangar full of armed vehicles including a helijet, an all-terrain carrier, and a midget submarine.	Levene, Lesley, Editor (2000), Thunderbirds Annual 2001 . Carlton Books Ltd. p. 18.
Raised in Malaya (back in the 1960s, some were still referring to Malaysia as Malaya) with his half-brother, Kyrano, who he later cheated out of his rightful inheritance.	Cole, Stephen (2002), Thunderbirds International Rescue Annual 2003, 'Biography,' Carlton Books Ltd. ISBN 1842226759
Raised in Malaya with his half-brother, Kyrano, who he later cheated out of his rightful inheritance.	Cole, Stephen (2002), Thunderbirds International Rescue Annual 2003, 'Biography,' Carlton Books Ltd. ISBN 1842226759
Half-brother to Kyrano and villain of the series.	The Thunderbirds Information Sheet. This document provides definitive proof of the official birth order of the Tracy boys. It was mailed directly from Gerry and Sylvia Anderson's office to fans who wrote in requesting information about International Rescue. The document we have (see menu to the left, "TB Info Sheet"): a picture of it was sent originally to Peter Singleton on April 4, 1966. It was signed by Una, Gerry Anderson's secretary, on his behalf. Pete Singleton shared it with Stephen La Riviere (TB 1965), who shared it with TICipedia webmistress Jaimi Sorrell on June 10, 2017 (and later publicly as well on the TB 1965 Facebook page).
Named the Hood because he dons many disguises.	The Thunderbirds Information Sheet. This document provides definitive proof of the official birth order of the Tracy boys. It was mailed directly from Gerry and Sylvia Anderson's office to fans who wrote in requesting information about International Rescue. The document we have (see menu to the left, "TB Info Sheet"): a picture of it was sent originally to Peter Singleton on April 4, 1966. It was signed by Una, Gerry Anderson's secretary, on his behalf. Pete Singleton shared it with Stephen La Riviere (TB 1965), who shared it with TICipedia webmistress Jaimi Sorrell on June 10, 2017 (and later publicly as well on the TB 1965 Facebook page).