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Twins Josh and Danny continue following clues leading them to marbles filled with scientific code, despite the fact that mad scientist Petty Potts' REPTOSWITCH formula is having some very strange side-effects.

Twins Danny and Josh reveal to neighbor Petty Potts that they have been on a quest to find marbles containing secret code and soon find themselves--as geckos--in her new secret laboratory within the very pink Princessland.

To prove he can still do his job, a veteran CIA black ops agent is assigned to guard a code operator at a top-secret CIA "numbers station, " which sends and receives encrypted messages.

While on vacation with their parents in Cornwall, twins Danny and Josh follow clues to another marble but find themselves trapped by the tide on a rocky island and the only way back is to use some pilfered REPTOSWITCH.

When Earth intercepts a message from a long-extinct alien race, it seems like the solution humanity has been waiting for. The Undying's advanced technology has the potential to undo environmental damage and turn lives around, and their message leads to the planet Gaia, a treasure trove waiting to be explored. For Jules Addison and his fellow scholars, the discovery of an ancient alien culture offers unprecedented opportunity for study... as long as...

The Sigma Force must solve a centuries-old secret involving coded prophecies about dark events leading to a future apocalypse.

When Matt the Brat forms his own club, Cody and the other Code Busters gear up for competition.

Four women who worked as codebreakers at Bletchley Park have taken up civilian lives. Susan has collated data about a series of murders. She tries to persuade the police she knows where another body is, but they are unable to locate it and dismiss her. She turns to her three friends and they work out where the next victim will be taken, find the body, and then decide they are the only ones who can track down the killer.

When a CEO refuses to approve an illegal device that sustains human life, she and her husband are kidnapped. Their daughter must develop an unlikely ally, a homeless veteran, to save them from those who would kill to live forever.

When a mysterious letter written in code arrives at King's house for his human, Kayla, he follows the trail of the person who left it.