Dr. Quest travels to a Venetian mansion to authenticate the claims and machinery of paranormal scientists. The situation turns dire when the machine accidentally empowers a malevolent entity.

A missing link is found in an alien spaceship that landed on Easter Island. But when Dr. Quest and Race enter Questworld to investigate what they've found, they run into Jeremiah Surd - who wants to experiment with human de-evolution.

The Quest team follows Estella Scheele to find her missing ornithologist grandfather, and ends up finding the lost golden city of El Dorado.

Race is hired to contain a nerve gas leak in Chicago, the legacy of a botched raid on Dr. Jeremiah Surd years earlier. When he and Dr. Quest are trapped, it's up to Jonny, Jessie, and Hadji to find the renegade scientist.

Dr. Zin launches the ultimate plan to defeat the Quests.

After the death of Dr. Zin, his two daughters are determined to carry on the Zin dynasty by destroying all the members of the Quest Team.

Centuries ago, ruthless pirate Black Jack Lee rode The Ivory Web to the Bermuda sea floor. When oil explorers are assaulted by a ghost ship under his apparent captaincy, Dr. Quest prepares the Questor for an investigation.

Scientists are working on transdimensional technology that will help them open a portal to another dimension - and its denizens, who waste no time staking their claim on Earth.

A tiger is loose in the Big Apple, and the Quest team must track it down, through subway tunnels, located underground.

Race has to cross an obstacle course where he set the record for Special Forces recruits -- but there've been some modifications since he was last there.

During an expedition with Jessie's mother Estella, the Quest team discovers a plague that wiped out an ancient Inca-like tribe.

In the Old West, the thief Belle Bonnet stole a wagonload of gold to help an Indian school stay open, but both thief and gold were lost in vast caverns under the American desert—until the Quests took the case.

When Ezekiel Rage hijacks a space shuttle commanded by Dr. Quest and Hadji, Jonny and Jessie must stop Rage's minions who have taken over Mission Control.

The insane Surd finds a way to switch bodies with Race and is ready to go on a rampage using his new identity. And now it is easier for him to kill Benton Quest (who can reverse the process).

The Quest team believes that the Canadian legend - Bigfoot is roaming in the Quest compound stealing electronic devices. They try to find out what is going on as hunters bag themselves an exotic trophy.

A man named Ezekiel Rage seeks vengeance because of the tragic loss of his family in a covert operation when he was a government agent. And the Quest Team gets in his way...

On a visit to the Czech Republic, Jonny and Jessie encounter a ghostly apparition that leads them to an incomplete sonata -- and a generations-old secret.

Jonny, Jessie and Hadji track an elephant, Ndovu, as it returns to the elephants' graveyard. They bump into poachers on the way there, who are determined to kill Ndovu right away.

A century ago, the cargo ship Mary Celeste sank under mysterious circumstances. While on an expedition to find the Mary Celeste's remains, Dr Quest discovers what look like crop circles at the bottom of the Sargasso Sea--and a graveyard of ships in an area barren of marine life.

En route to Nova Scotia in the newly christened Questor II, Jonny, Jessie and Hadji come upon a fog-enveloped island with a tragic history.

While touring Bangalore, Jonny, Jessie and Hadji find a rare falcon, reputedly from a hidden realm that appears once every 500 years - a realm whose river's water is said to bestow immortality. A beautiful ornithologist is also very interested in the bird; but is she who she says she is?

While trying to reach Northern Siberia to backup the Quest Team, her plane crashes and she discovers a colony of ancient Russians underground.

The Quest Team discovers that criminals were using Alligators to break into a drilling factory in the Florida Everglades when they were investigating the case using an ornate Viking Sword that the Alligators left behind.

Jonny and Benton venture into Jessie's mind to undo Surd's malicious attempt to strike at the Quest team from within - but it turns out that Jessie can take care of herself.

Surd lures Jonny into a labyrinth of horrors, after stealing the Apollo statue, which was reassembled by Dr. Quest.

Holding an Anasazi beacon capable of calling the alien fathers of current technology, Alice Starseer is pursued by men in black and asks Dr. Quest for help, whose capture provokes a cross-country rescue by Jonny and Jessie.

Air Force One vanishes with the president within it, and all the evidence points to Benton Quest and Race Bannon. Jonny, Jessie and Hadji must elude government agents to prove their fathers' innocence by finding the real culprit.

Travelling to Indonesia to help an old friend recover a precious jewel, Race, Jonny and Jessie discover it is protected by a supernatural force.

Ezekiel Rage plants a nuclear bomb in the bowels of Earth and Jonny and Jessie must revert back into time to stop his evil deed.

Extraterrestrial transmissions turn out to be warnings to stop a series of space experiments, and the Vice President turns out to be an alien.

Dr. Quest, Jonny and Hadji head to New Jersey to investigate the Jersey Devil. Then they run into a two-hundred-year-old feud between descendants of the Redcoats and the Minutemen over the original copy of the Declaration of Independence.

A werewolf attack in the Yukon brings a Quest team investigation to the home of a humanitarian doctor; the light of the moon illuminates both danger and mystery as the hunt begins.