The Adventures of Mark Twain, also known as Comet Quest in the United Kingdom, is a 1985 American independent[5] stop-motion claymation fantasy film directed by Will Vinton and starring James Whitmore.

[7] Huckleberry Finn and Tom Sawyer sneak aboard an airship piloted by Mark Twain in their dreams of becoming famous aeronauts.

The boys learn that Twain intends to pilot the airship to meet Halley's Comet, and are worried that this goal will end in their deaths.

Twain quickly coaches the kids on how to pilot the ship, but they fail to avoid smashing into a mountain and losing a chunk of the hull.

Huck and Becky are excited at the opportunity to return home, but Tom only cares about avoiding Aunt Betty's chores and changes the floor before the others can protest.

Tom explains his plan to Huck and Becky, and they conspire to sabotage Twain's suicidal voyage and take control of the airship.

They lie low as Twain teaches them how to fly the vessel, and Tom senses an opportunity in the central power panel.

The kids ask if there is another life waiting for them after they collide with the comet, and Twain relates the story of Captain Stormfield's Visit to Heaven.

They enter the comet and finally come face-to-face with the strange figure who has been haunting the ship: Twain's double.

[9] Research into the life of Mark Twain was performed by Daniel and Mary Yost which in turn was adapted by Will Vinton's then wife, Susan Shadburne, into an original story.

[10] The characters were designed and sculpted by Barry Bruce, and Gary McRobert developed a new computerized motion system to replace the old wooden hand-cranked method.