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.

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.

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 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.

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.

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.

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.