"Miss Z, a mysterious billionaire and a collector of rare photographs, is sending her four recruits back in time on a mission to capture, for the first time, one of the most important moments in American history-- Abraham Lincoln giving his famous Gettysburg address"--

Using a mysterious wardrobe that allows them to travel through time, two eleven-year-olds, Federico a boy from the Italian Renaissance and Bee a girl from present-day New Jersey, work together to prevent the bickering between two great artists from changing the future.

Children's birthdays are always strange in Willow Falls, but when Connor's little sister Grace falls into a frozen state on her tenth birthday, Amanda and Leo must travel back in time to find out what force prevented Angelina from casting the blessing that would have protected her.

Their magic tree house takes Jack and Annie back to retrieve a lost story in ancient Greece, where they witness the original Olympic games and are surprised to find what girls of the time were not allowed to do.

When Corey learns that he has the ability to save lives while time traveling, he is determined to go back in time to save his grandmother who died on September 11, 2001.

On Christmas Eve, Jack and Annie's tree house transports them to King Arthur's castle at Camelot, where they undertake a quest to the castle of the Otherworld.

This time Ranger, the time-travelling Golden retriever, finds himself transported to the deck of the USS Arizona on December 7, 1941, where he rescues the young sailor Ben Hansen who is badly burned when the ship explodes--and there is a Japanese-American boy and girl in a rowboat who also need his help to find their father amid the chaos of the attack.

Cleo is back at Yasiro Academy, recovering from the tragic events that happened on planet Hykosis. She feels responsible for the death of her friend Zaid, and trains nonstop. And when she learns that the Golden Lion - a star with immeasurable energy that could destroy them all if weaponized - has been located, she goes alone to the snowy, icy planet Cada'duun to find it. There, she faces of with a new enemy who has been instructed to destroy the Golden...

Four children, all possessing extraordinary mental powers, are projected far into the future to a bleak region called Dustland.

Their magic tree house takes Annie and Jack to Pompeii just as Vesuvius is about to erupt, and they must find a Roman scroll before everything is covered with burning ash.