Where on Earth is Carmen Sandiego?

In a flashback episode we see a young Detective Carmen Sandiego foil Dr. Maelstrom and his diabolical plan to raise and steal the Titanic.

In the rousing climax to a three part story, Carmen works with Zack and Ivy to stop her evil nemesis, Dr. Maelstrom, who is bent on destroying her forever, while carrying out a plan to steal "the unstealable" - Noah's Ark!

Carmen learns that Dr. Maelstrom, an arch enemy she arrested ten years ago, while an Acme detective, has escaped from prison. The evil ocean going genius is bent on destroying Carmen's reputation as the world's greatest thief.

When Carmen's henchman Mason Dixon bungles a robbery at Appomattox, he goes back in time to take Carmen's place as the world's greatest thief.

Carmen is 'kidnapped' by R. B. Traitor, a vigilante ex-judge who claims he's prosecuting her for stealing the Magna Carta. After tracking her to Traitor's bogus court, Zack and Ivy find themselves going to the ends of the earth to defend the thief.

Zack and Ivy learn the history behind the modern celebration of Halloween, when Carmen begins stealing some VERY strange items that can lead them to only one conclusion - She's planning the ultimate Haunted House.

Acme's intrepid new techno whiz kid, JOSHA, has a crush on Ivy. He keeps trying to ask her out during the strange twists and turns of the latest Carmen case.

Carmen's latest theft has her believing she has found her long lost father. However, when this famous millionaire is kidnapped by ex-Acme Detective/ex-Carmen Protégé, LEE JORDAN, she has a change of heart and goes back to her thieving ways.

In a rousing climax, Carmen must steal items from all over the world in hopes of ransoming Malcolm Avalon from the maniacal Lee Jordan. When she finally confronts Lee to make the exchange, he demands one final "job" from her.