A ferocious mechanical crustacean-like creature called the leviathan guards the entryway to Atlantis and attacks the submarine carrying Rourke and his team.

Cartographer/linguistics expert Milo Thatch (center) uses an ancient book called "The Shepherd's Journal" as his guide to unraveling the mysteries of Atlantis.

Milo Thatch (left), who has devoted his life to studying Atlantis, uses a mysterious ancient book called "The Shepherd's Journal" to guide Commander Rourke (right) and his lieutenant, Helga Sinclair (center), to the lost city.

A team of explorers, including (left to right) Helga, Moliere, Commander Rourke, Cookie, Milo Thatch, Dr. Sweet, Audrey, Vinny, and Mrs. Packard, stand on the brink of a startling discovery when they journey through a crevice in the ocean floor to reach a lost civilization.

This hilltop view of the ancient city of Atlantis reveals a once-beautiful paradise that is slowly decaying.

Milo Thatch (left), an expert on the ancient civilization of Atlantis, and Princess Kida (right), daughter of the Atlantean king, join forces to explore an underwater cave that holds valuable secrets.

Princess Kida (second from left), the daughter of the Atlantean king, and a team of explorers from the surface -- Commander Rourke (right), cartographer Milo Thatch (second from right), and Lieutenant Helga Sinclair (left) -- discover a secret crystal chamber beneath the city.

In his final moments, the dying king of Atlantis (left) reveals the tragic circumstances of the empire's past to Milo Thatch (right) and empowers him to save its inhabitants.

Milo Thatch (center left), a naïve young cartographer/linguist, finds the inner strength he needs to rescue the princess and save Atlantis as he leads a fleet of flying stone-fish vehicles.

Michael J. Fox in Atlantis: The Lost Empire (2001)

Cree Summer in Atlantis: The Lost Empire (2001)

Leonard Nimoy in Atlantis: The Lost Empire (2001)

Phil Morris in Atlantis: The Lost Empire (2001)

Jacqueline Obradors in Atlantis: The Lost Empire (2001)

Don Novello in Atlantis: The Lost Empire (2001)

Corey Burton in Atlantis: The Lost Empire (2001)

Claudia Christian in Atlantis: The Lost Empire (2001)

John Mahoney in Atlantis: The Lost Empire (2001)

Jim Varney in Atlantis: The Lost Empire (2001)

David Ogden Stiers in Atlantis: The Lost Empire (2001)

Michael J. Fox, James Garner, Claudia Christian, and Cree Summer in Atlantis: The Lost Empire (2001)

Michael J. Fox and John Mahoney in Atlantis: The Lost Empire (2001)

Michael J. Fox and Cree Summer in Atlantis: The Lost Empire (2001)

Michael J. Fox, James Garner, and John Mahoney in Atlantis: The Lost Empire (2001)

The state-of-the-art submarine "Ulysses" is in final stages of preparation for its maiden voyage to find a lost world.

The ancient civilization of Atlantis experiences a natural catastrophe when it abuses its superior powers.

Museum cartographer/linguist Milo Thatch finds that his bosses are unwilling to hear his theories about finding Atlantis.

Milo Thatch (center), a linguistics expert with a lifelong fascination in Atlantis, meets his shipmates -- dirt-loving geologist Gaetan Moliere (left) and the gentle Dr. Sweet (right).

A team of daredevil explorers observes the wonders of an undersea world from the bridge of their state-of-the-art submarine, the "Ulysses."

The "Ulysses" (center, above the leviathan), a state-of-the-art submarine carrying a team of daredevil explorers on a mission to find Atlantis, makes its way across the bottom of the ocean.

Michael J. Fox, Jacqueline Obradors, Corey Burton, Phil Morris, and Don Novello in Atlantis: The Lost Empire (2001)

Michael J. Fox, Jacqueline Obradors, Corey Burton, Phil Morris, and Cree Summer in Atlantis: The Lost Empire (2001)

Michael J. Fox, Leonard Nimoy, James Garner, John Mahoney, David Ogden Stiers, Jim Varney, Jacqueline Obradors, Steven Barr, Corey Burton, Claudia Christian, Jim Cummings, Phil Morris, Don Novello, Patrick Pinney, Florence Stanley, Cree Summer, and Natalie Strom in Atlantis: The Lost Empire (2001)

Michael J. Fox, Corey Burton, Phil Morris, Don Novello, and Cree Summer in Atlantis: The Lost Empire (2001)