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Today is the day. It's time to dig up the time capsule buried fifty years ago at Mulberry Springs Elementary. The whole school is there, but when the time capsule isn't where it should be, three students, Millie, Marta and Mike, jump into action.

The time capsule buried fifty years ago at Mulberry Springs Elementary is not where it should have been. Millie, Marta and Mike are eager to solve the mystery -- and uncover the key to the community's past.

The detectives' classmate, Elena, has lost her show and tell object -- a gift from family in Puerto Rico. The detectives trace the object across campus and through countless hands, learning about the strong ties between family and place along the way.

Mulberry Springs' beloved Mockingbird Creek is overrun with litter and trash. Millie, Marta, and Mike take the case, but discover that while finding the source of the trash might be easy, cleaning up the creek is a different story.

Mulberry Springs Elementary's cafeteria chef, Lunchroom Larry, has a secret new recipe he guards closely. When Mike gets suspicious about exactly what is in the dish, the detectives take on the case of the mystery mash, learning about how food travels -- from near and far -- to find its way to our plates.

The detectives' rambunctious classmate, Spencer Lewis, is convinced his teacher is a robot, and Millie is eager to prove him wrong.

The local library has received a boatload of books from a mysterious donor -- only the latest in a series of impressive gifts being given around town.

The detectives work to deduce a food critic's secret identity.

Rumors of strange circles appearing in local cornfields put the Harvest festival in jeopardy.

The Mystery League works to learn the truth and save the Harvest Festival.

Millie dozes in class, only to wake up in Mulberry Springs Elementary in the mid-1970s. The school is abuzz with the discovery of a dinosaur egg, but Millie and her mid-century classmates are determined to get proof -- which is a tall order without cell phones, computers or the tools of modern science to help.

The local paper has reprinted the well-known legend of the town's founder LaFayette Matlock's buried treasure. The detectives set out solving riddles and learning about maps to find the gold -- but quickly learn that what is ordinary to one person might be another person's treasure.

On a trip to Mockingbird Creek, Marta discovers a new digital camera hidden in the bushes.

Millie works to convince her friends to take a school vote seriously, when everyone is more interested in the identity of Sammy the Sloth.

As mayor for the day, Millie learns that being a leader often means asking for help.

It's field trip day at the state museum, and Mr. Davis has challenged the students to find their favorite symbol of Arkansas history. Marta teams up with an uninspired Terrell to help him learn more about some interesting events in the state's history.

The detectives set out to uncover the author of The Dancing Detective book series.

The community works together to deduce who took the key to the city and just where they're hiding it, in time for the mayor's ceremony.