Molly Moon, is hypnotized and eventually transport back to nineteenth century India, where she meets a maharajah with a speech defect as well as former versions of herself.
While on a field trip to New York's Museum of Natural History, Joe, Sam, and Fred travel one hundred years into the future, where they encounter robots, anti-gravity disks, and their own grandchildren.
Johnny Dixon and Professor Childermass discover a trolley which transports them back to Constantinople in 1453 as the Turks are invading the Byzantine Empire.
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.
While on a mission to prove to Merlin that they can use magic wisely, Jack and Annie travel to seventeenth-century Venice, Italy, to save the city from disaster.
While dealing with changes at home, sixth-grader Josh and his friend Aaron use the computer at their New York prep school to travel through time, learning some secrets from the school's past and improving Josh's home situation.