Around the world in 80 mysteries

Christina, Grant and their two friends join their parents on a trip to Australia, and find themselves in the middle of a mystery in Sydney involving mysterious men with Loch Ness monster tattoos.

Christina and Grant have an adventure involving a mysterious map while visiting Neuschwanstein Castle in Bavaria, Germany, with their grandparents during Oktoberfest.

Grant, Christina, and their new friend Sam embark on a great adventure in the Amazon rainforest, where they meet a native boy who helps them through a maze of ancient ruins, where they find a new mystery to solve.

Christina, Grant, and their new best friends, George and Maggie, explore London together as they try to solve the mystery of Big Ben.

Follows Mimi, Papa, Christina, and Grant as they travel to Transylvania where they tour a famous castle and learn about vampires.

Follows Mimi, Papa, Christina, and Grant as they solve the mystery of the curse of ancient Acropolis.

Mimi, Papa, Cristina, and Grant find a series of clues that helps them to discover where a stolen statue from the Louvre Museum in Paris might be hidden.

Christina, Grant, and their friends join their parents on a trip to China, and find themselves in the middle of a mystery involving the Great Wall.

Mimi, Papa, Grant, and Christina become embroiled in a mystery in Egypt that involves a missing pyramid.

Mimi, who is fond of writing about mysteries, travels to Antarctica with her Papa, Christina, and Grant to search for the cause behind some penguins that have gone missing, and though they receive a warm welcome, not everyone is happy with their arrival.