When Oliver plans on revealing his VisiCron technology to the world in return for fame and glory, Dee brings back the co-discoverer of insulin, Dr. Frederick Banting, whose own widespread fame in his day became nothing but an irritant.

Ghostly incidents are happening in the school. To help figure out who is responsible for them Oliver and Dee summon Sir Aurthur Conan Doyle. Oliver keeps questioning this punk looking girl who just seems to appear everywhere. Is she a ghost? Is she responsible for the ghostly incidents?

Dee is running for Student Council but bad rumours about her are going around the school, so she summons Queen Elizabeth I for political advice.

Dee reads Anne Frank's diary entries and decides that Anne deserves 36 hours of free time from the attic hideaway. Anne Frank cannot believe how free it is where Dee and Oliver live from her attic hideaway. Anne starts to really like or should I say love Oliver. Dee and Oliver decide to take Anne to the movie theatre. During the movie Anne steps out of the theatre and meets this punk guy in the theatre's video arcade and finds that there's a lot of goodness in him. So that tought Dee and Oliver how to find goodness in people. At the end of the episode before Anne's 36 hours run out she says that it has been the best 36 hours she has ever had in her life.

Oliver and Dee summon natve American Sacagawea to help in an expedition to expose a refinery that is secretly causing river pollution.

Oliver accidentally causes himself and Dee to be transported back in time by 24 hours, giving them an opportunity to right a wrong.

Dee summons the inventor of basketball, Dr. James Naismith, to coach her on winning an important game.

After Oliver has a row with his dad, Dee brings the man forward in time as a teenager, hoping that they will learn to better relate to each other.

Oliver finds Dee being around this other guy a lot. Oliver decides to bring back Casanova because he thinks that he will be able to give him some tips on attracting girls. Unfortunately Casanova is giving Oliver really bad advice. When Oliver follows Casanova's advice, he makes a huge fool of himself.

When a financial crisis causes Dee's mom to question her faith, Dee brings Moses from the past to advise her, not realizing that she has summoned the young Moses, when he was but a humble shepherd rather than a great leader.

In danger of losing Visicron to a corporate software pirate, Oliver summons the famous 18th Century pirate Black Bart to help him fight fire with fire.

Oliver adds another module to Visicron to speed it up. When Oliver tries to bring back Jack London, the Visicron instead takes Oliver to the time and place Jack London is right now. Oliver has to try and find a way back, so Dee asks Simon to help find a way to bring Oliver back. Meanwhile Oliver keeps altering the future and weird things keep happening in the present.

Plagued by a recurring dream, Dee summons famous prophet Nostradamus to advise her on what it means.

Oliver is just about to delete Visicron before going to college, but then he is transported into the future by an old man. Oliver gets accused by the old man of being careless with time travel. Oliver and the old man watch clips of past episodes on a screen so that Oliver can defend himself and show the man what good Visicron has done. The old man convinces Oliver he shouldn't delete Visicron and then Oliver gets sent back to the present. We later find out that the old man was really Oliver himself as an old man in the future. In the end right before Oliver leaves to Montreal, Quebec, Canada to go to college he gives Visicron to his 12 year old cousin Simon.