Theo and friends must face Aapep himself if they are to save the world from destruction. 

Will returns to Aapep's lair, while Aapep forces Nigella to seek out and destroy Theo. 

An accidental body-swap forces Theo and Safiya to pretend to be each other. 

Aapep is loose in London, and the museum's mummies have developed a mind of their own! 

Someone, or something, has been stealing magical power from the museum. 

Theo and Will try to discover what the Serpents of Chaos are planning. 

Can Theo prevent Aapep escaping his prison beneath the Great Pyramid of Khufu. 

It's Theo's 15th birthday party, but someone is after the pyramidion's secret. 

The pyramidion's power turns Will's dreams of fame into a magical nightmare. 

Theo must race to save Will, Safiya and Henry, who have been swept into a dream world. 

Theo tries to decipher the secrets of her grandfather's journal, with disastrous results. 

Can Theo save Will and Safiya, who are trapped inside a secret room? 

A statue with a will of its own leads Theo and her friends to a brand-new mystery. 

With the help of the Staff of Osiri, Theodosia competes in a magical battle against the Chief Serpent in order to save her friends. 

Theo is taken in by the strong magic of the staff, using it to help remove the invisibility curse that Will is under. 

The serpents demand that Theo and Safiya give them the Staff of Osirus, which the pair have just found in the temple. 

The Serpents are on the hunt for Theo, Safiya and the Eye of Horus. The two girls attempt to fool them by using a dangerous invisible rope that will hide anything inside it when formed into a loop. 

Theo manages to create duplicates in an attempt to fool the Chief Serpent and take back the amulet. 

Theo and her friends begin a desperate search to recover the Eye of Horus and prevent the Serpents of Chaos from gaining control of the powerful artifact.

Theo is offered a place among the Serpents of Chaos when confronted by Yaret, the group's leader. 

Miss Krait arrives to potentially give Theo's parents a new dig license, but Theo grows suspicious when she starts showing interest in the Eye of Horus. 

Sinister forces emerge while Theo and her friends take time out for a table-tennis tournament at the Penny Arcade.

Theo's plan to make her parents' museum safe from dark forces is thrown into chaos when Will and Henry are whisked away by an ancient portal.

After her experiments with ancient Egyptian magic go a little too well, Theo must race against the clock to save Safiya and her father from certain doom.

Fearing her father has been cursed, Theo recruits Henry, street magician Will, and Egyptian princess Safiya in her search for a cure, leading them to the home of a mysterious thief – and a newfound world of magic and danger.

After stumbling upon a mysterious amulet in an Egyptian tomb, turn-of-the-century teen Theodosia "Theo" Throckmorton develops magical powers, throwing herself – and her family – into a perilous ancient mystery.