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When will you learn, Doctor Quest, that I do not care for your Interferences?
~ Dr. Zin to Dr. Benton Quest in The Fradulant Volcano.

Dr. Zin is the main antagonist of the original Jonny Quest animated series. He is a power-hungry scientist who was the sworn arch-enemy of Dr. Benton Quest, and, by extension, his son, Jonny. Descended from the Mongol Khans, Zin believed he was destined to create a "Zin Dynasty" and would stop at nothing less than world domination. Although a brilliant scientist in his own right, Zin often attempted to steal his rival Dr. Quest's inventions and ideas for his own use. He had two daughters, Anaya and Melana, who became known as the "Zin Twins".

He was voiced by Jeffrey Tambor, who also played K. Edgar Singer in Muppets from Space, Mr. Big in WordGirl, Crocker in Batman: The Animated Series, and Mayor Augustus Maywho in Dr. Seuss' Horton Hears a Who!. In Tom and Jerry: Spy Quest, he was voiced by James Hong.


Jonny Quest

Zin primarily operated behind the scenes, relying on various operatives and machines to do his bidding so he would not get his hands dirty. He first tried to create synthetic gold to increase his already vast wealth, but his operation in India was stopped by the Quests. He then attempted to use a gigantic spider-like robot probe to attack a military base and steal the designs for Dr. Quest's para-power ray. The robot was destroyed by the experimental para-power ray before it could return to Zin with the plans.

Zin also kidnapped Race Bannon and replaced him with a double so the double could steal a Thai drug created by Quest to enhance astronauts' alertness while in space, but Jonny and Hadji suspected "Race" and enlisted the aid of Jezebel Jade to expose the impostor and rescue the real Race. After this, Zin hatched a scheme to sell a weapon of mass destruction out of a dormant volcano in Haiti, using trickery and special effects to make it seem as though the volcano was active to keep people away. Dr. Quest and his team foiled the plan and the local military destroyed the volcano, however Zin survived because he was transmitting from elsewhere.

Jonny Quest: The Real Adventures

Zin with a beard.

By the time Jonny, Hadji and Jessie were all young adults, Zin returned with a vengeance, assisted by his daughters Anaya and Melana. He held a NASA space station hostage and also reused his original robotic spies in an effort to kill the Quests once and for all. After that failed, he and his daughters enlisted the help of Dr. Hatani to created robotic ninjas called Zinjas to kill the Quests. Once more he was bested by his old enemies, and, swearing revenge, Zin escaped with his daughters and Dr. Hatani, vowing to return.

Other Media

The New Adventures of Jonny Quest

In "Aliens Among Us" he stages a fake alien attack and kidnapped Hadji and Jonny to steal a ship Dr. Quest was created, but this was twarted and the cavern base was destroyed. However Zin survives.

In "Deadly Junket", he had a scientist kidnapped in order to create systems to sabotage missiles.

Jonny's Golden Quest & Jonny Quest vs. the Cyber Insects

Main article: Dr. Zin (Jonny's Golden Quest)

Tom and Jerry: Spy Quest

Zin in Tom and Jerry: Spy Quest.

Tom and Jerry have a relaxing day at the beach until Jonny Quest, Hadji and Bandit arrive. They have to help stop an evil cat army from stealing Dr. Benton Quest's newest invention for him.

In this film, Dr. Zin believes Tom is Dr. Quest's secret weapon, but only because when Tom is terrified of Bandit (without realizing it) he makes lightning-fast loops.

Dr. Zin eventually escapes but in a horrible way.