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

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

The Quest Team enjoy a trip to the Indian Ocean to discover if there are really sea monsters roaming the seas, leading to multiple mysterious ship disappearances in the Seychelles.

With Benton Quest and Race Bannon attending a phenomenology conference in the Himalayas, Jonny and Jessie are forced to impersonate their fathers in Questworld when Jeremiah Surd launches a two-pronged attack on the Quest compound - and Hadji's mind.

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...

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

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.

Dr. Quest is commissioned to find the Philosopher's Stone, which is reputed to turn dross to gold. When he succeeds in capturing the object, he donates it to the museum. It is stolen by Quest's partner, who wants to try it out for himself.

Alice Starseer returns to Earth to lay her grandfather to rest. But Jeremiah Surd is determined to find out what she's learned.

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.

On an archaeological expedition in Borneo, the Quest team run into a giant creature, reputed to savagely attack from all directions at the same time.

Jeremiah Surd taps into and gains control of the cetacean communications internet, prodding cetaceans worldwide into savage attacks; the Quest team enlists the help of Captain Havell to stop his plan.

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.

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

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.

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.

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.

Dr. Quest is missing while on an expedition to find the Yeti. Jonny and his friends head to the Himalayas to find him, but run into another scientist who's determined to bring back the Yeti.

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

Ezekiel Rage steals a compact nuclear device and plans to blow up the polar ice caps. The Aurora Borealis holds the key to stopping him.

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.

The Quest team employs QuestWorld to try and revive Race, who has been rendered comatose in a rodeo accident caused by Jeremiah Surd -- who in turn exploits the opportunity to attack Race at his most vulnerable.