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.

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.

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.

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.

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.

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.

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

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.

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...

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.

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.

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.

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.

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.

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.

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

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.

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.

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.

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

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.