A teenage boy from the year 2121 comes back to the current time with his family for vacation in a time machine, which breaks down and leaves them stuck in our time. Now they have to cope with the norms and customs of our time. (imdb)

Lloyd forces Phil and Pim to switch bodies because of excessive arguments. Meanwhile, Lloyd tries to get Curtis a job. (imdb)

When Keely changes her future for the worse by looking at a future Internet machine, Phil and Keely must pass an impossible test given by a tough teacher. Pim sneaks into an R-Rated movie with Curtis as her guardian, but is scared stiff by it. (wikipedia.org)

To thwart his suspicion, Phil invites Vice Principal Hackett to dinner at the Diffys' after Hackett moves in next door, but appearing to be a "normal family" is more difficult than it seems. (wikipedia.org)

Phil meets the new girl, Via, and makes her hang out with Keely so he can free himself from doing girl stuff with Keely. But Phil soon gets jealous when Keely spends more time with Via than him. (wikipedia.org)

Phil and Keely are going together to the school dance, which excites them both... until Lloyd tells Phil that he has fixed the time machine and the Diffys are leaving on the day of the dance. (wikipedia.org)

It's career week at H. G. Wells high school, but Phil can't find a career that suits him. Pim decides to pursue a career as "The Man". (wikipedia.org)

H.G. Wells is about to bury a time capsule which Lloyd and Barbara will find in the future. Lloyd tells Phil to place a note in the capsule warning them not to travel into the past, but it means that Keely and Phil's memories of each other will be erased forever. (wikipedia.org)

Phil finds a part of the time machine when he goes to the museum; Keely and Owen sneak into the museum basement in order to film material for her project. (wikipedia.org)

When Phil and Keely baby-sit Nathan, the trouble-making nephew of Mr. Messerschmitt, they get more than they bargained for, so they use the New-Ager, a device that changes one's behavior. But things go hay-wire, leaving Nathan to act like an old man, while Phil is acting like a little boy. (wikipedia.org)

When Phil solves one of Mr. Hackett's difficult math problems, Keely accidentally blurts out the answer and is upgraded to the advanced math class. (imdb)

Pim abuses her day of being a principal. (wikipedia.org)

When Phil feels his family's invasion of his privacy has gone too far, he opts to move into the garage with Curtis, but finds out the responsibility may be more than he can handle. (imdb)

After embarrassing himself with his knowledge of future-history, Phil gets fed-up with having to be dishonest about where his family is from. Phil comes clean to the world, but his newfound fame destroys his friendship with Keely. Meanwhile, Pim goes up against Helka the Hulka at a weightlifting competition. (wikipedia.org)

At Christmastime, Phil tells Keely the truth about how their paths first crossed. (imdb)

Keely tries to put together two classmates, Grace and Grady. When she gives Grace a complete physical and confidence makeover, she then tells her to go for the person she likes. To Keely's surprise Grace likes Phil instead of Grady. (imdb)

When Keely's undercover news show isn't getting any viewers she teams up with Pim, who advises her to talk about fashion. While Pim's ideas gain Keely a big audience, it turns her show into an infomercial and makes her a trendsetter instead of the investigative reporter she intended to be from the beginning. (imdb)

Phil forgot about Keely's birthday his first year in the past. This year, he gives Keely the best birthday present of the century, a skyacking trip. But then, Lloyd takes all the batteries out of their future gadgets. Pim meets her match named Simon Buber. (imdb)

The Diffy family contract and futuristic disease known as "Greenamia" which causes them all to act completely opposite of their personality. (imdb)

Phil loses his wizard, and then he goes on a hunt for it with Keely and Pim. They find out that it has landed in the hands of Vice-Principal Hackett, who soon discovers what the wizard can do. Phil,Pim and Keely then plot a plan to get the wizard back. (imdb)

Phil finds out that a kid in his school is actually his great-great-grandfather. But when Phil accidentally messes up the course of history, he, Pim, and Barb start to disappear. (imdb)

Phil and Keely find out that they were voted 'Cutest Couple,' so they start dating. Meanwhile Pim notices that the time engine (which Lloyd is working on) on the table could easily be fixed. So the secret is out: They are going home. But that doesn't sell well for Phil and Keely. (imdb)