Sarah-Jane and her two cousins solve a mystery involving an antique locket they plan to give their favorite baby-sitter.

While celebrating "Christmas in July," the three cousins come into some stolen art works and discover that even bad boys can be good.

Ten-year-old cousins Titus, Timothy, and Sarah-Jane go on vacation together and set out to discover why the dolphins they are visiting don't seem to want to eat.

Ten-year-old Timothy and his cousins Sarah-Jane and Titus, who make up the Three Cousins Detective Club, investigate when all the lawn ornaments in the neighborhood disappear and then are put back in the wrong places.

While watching over her neighbor's beehives, Sarah-Jane, Titus, and Timothy find an important clue to the location of a missing stongbox which contains a valuable recipe.

A special day camp lets three cousins get a look at what happens behind the scenes at the zoo, which helps them solve a mystery involving an escaping pet snake and a missing diamond ring.

The mysterious appearance of a Teddy Roosevelt campaign button on Tim's baseball cap attracts the attention of an unscrupulous collector.

While visiting Lake Misty Pines, the three cousins hear about an archaeological treasure that may lie on the island in the middle of the lake and try to track a mysterious stranger.

The cousins investigate when a painter believes that his church's butterfly garden has mysteriously changed.

When he takes his neighbor's Maine coon cat to a ceremony for the blessing of animals, Titus finds a mysterious note in his pocket and with the help of his cousins determines its source.