Eight-year-old Jack and his younger sister Annie find a magic treehouse, which whisks them back to an ancient time zone where they see live dinosaurs.

The magic tree house transports Jack and Annie on a mission to the Ice Age where they encounter Cro-Magnons, cave bears, sabertooth tigers, and woolly mammoths.

Guided by a magic rhyme, Jack and Annie travel to ancient Baghdad on a mission to help the Caliph disseminate wisdom to the world.

Although Halloween is not celebrated on the planet Nebulon, Zach, a boy from Earth, discovers that ghosts may be real.

Zack and Drake venture to Gluco, the candy planet, for some Easter fun but while competing in such activities as an egg toss and a three-legged race, Zack is so determined to come in first that he considers cheating to win.

The Star Wars crew tries to escape the Death Star.

Zack loves everything about his new planet, Nebulon, until there is a complete cosmic blackout and he must try to function without his Indoor Robotic Assistant and hyperphone.

Dr. Bunsen has built a TV remote that can fast forward or rewind real time, but things spin out of control when the DATA Set accidentally change the channel. They have to escape cowboys and aliens to get back to their own reality before the universe is broken forever.

When Zeke learns that his parents' research mission is over and they must return to their home planet, Tragas, he and his friends seek a way to keep the family on Earth.

Harris and Roxy try to help Zeke the alien over his confusion about Valentine's Day, and to figure out who sent him an anonymous candy-gram.