Avery and Evan beg to "see real sharks!" maybe even discover a megalodon (giant prehistoric shark!) tooth. But something's wrong at the shark reef and the mystery needs to be solved!.
Christina, Grant, Alexis, and Griffin try to locate the Wright Brother's historic plane, which has been stolen on the eve of the 110th anniversary of the brothers' first flight.
Grant and Christina investigate the disappearance of a racehorse and two jockeys when they tag along with Mimi and Papa to the Kentucky Derby in Louisville, Kentucky.
Mystery follows Christina, Grant, Crystal, and Mick on their vacation to Disney World, where they need a little luck and loads of creativity to solve their latest case.
Young Christina and Grant go on a Grand Canyon trip with their mystery-writer grandparents and set out to solve a spooky mystery with Danielle and Marisa, the daughters of a local park ranger.
When they travel by train across America, Christina, Grant, Mimi, and Papa find themselves facing mysterious mishaps, spooky surprises, and treacherous tunnels.
