Jonathan "Jonny" Quest is a Tom Swift-like 11-year-old American boy who lost his mother at an early age. Although unenthusiastic in his schooling, he is intelligent, brave, adventurous, and generally athletic with a proficiency in judo, scuba diving, and the handling of firearms. He takes on responsibility willingly, attending to his homework (and/or household chores), telling the truth, and treating adults with respect. His voice was provided by actor Tim Matheson.

09 May 200825m

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S00E07

Dr. Quest

Dr. Benton C. Quest is Jonny's father and a scientific genius who works for the U.S. Government. He is considered "one of the three top scientists in the world", with interests and technical know-how spanning many fields. Raising Jonny and Hadji as a widowed father, he is benevolent, conscientious and decent, even though he is ready, willing and able to take decisive action when necessary for survival or defense. Dr. Quest was voiced by John Stephenson for five episodes, and by Don Messick for the remainder of the series.

12 May 200825m

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S00E08

Race Bannon

Roger T. "Race" Bannon is the special agent from Intelligence One assigned to safeguard Jonny "24 hours a day and 7 days a week as tutor, companion and all-around watchdog." Race was born in Wilmette, Illinois, to John and Sarah Bannon. He is an expert in judo, having a third-degree black belt as well as the ability to defeat notorious experts in various sporting techniques, including sumo wrestlers. He is also a pilot. The character was voiced by Mike Road, with his design modeled on actor Jeff Chandler. The name is a combination of Race Dunhill and Stretch Bannon from an earlier comic strip. The surname Bannon is Irish (from 'O'Banain') meaning "white".

16 May 200825m

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S00E09

Hadji

Hadji Singh is a streetwise 11-year-old Kolkata orphan who becomes the adopted son of Dr. Benton Quest, as well as Jonny's best friend and adoptive brother. Rarely depicted without his bejeweled turban and Jodhpuri, he is proficient in judo, which he learned from an American Marine. The seventh son of a seventh son, Hadji seems to possess mystical powers (including snake-charming, levitation and hypnotism), which may or may not be attributed to parlor trickery. The Quest family meets Hadji while Dr. Quest is lecturing at Calcutta University; he subsequently joined the Quest team after saving Dr. Quest's life (by using a basket lid to block a knife thrown at the doctor). Although slightly more circumspect than Jonny, he can reliably be talked into participating in most any adventure by his adoptive brother. He is voiced by Danny Bravo.

19 May 200825m

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S00E10

Bandit

Bandit is Jonny's pet bulldog, so named because he is white with black markings - including what appears to be a black domino mask around his eyes. This coloration is occasionally instrumental in foiling adversaries. Bandit is unique among his fellow Hanna-Barbera dogs (such as Scooby-Doo, Huckleberry Hound, and Hong Kong Phooey), as he is a regular non-anthropomorphic dog. Still, he seems uncannily able to understand human speech and is capable of complex facial expressions. Don Messick provided Bandit's vocal effects, which were combined with an archived clip of an actual dog barking. Creator Doug Wildey wanted to have a monkey as Jonny's pet, but he was overruled by Hanna-Barbera. Wildey has said that Bandit was intended to be a bulldog, though the dog differs in appearance from actual bulldog breeds.

23 May 200825m

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S00E11