The Aldens' dog, Watch, comes across a mysterious box with a note inside, a box that is part of a game called Geocaching. Henry, Jessie, Violet, and Benny join the game but soon suspect one of the members of the geocaching club is a thief.

When Annie tells him about her missing painting, Nate the Great and his trusted companion, Sam Spade, set out to investigate, gather clues, and solve the mystery.

When the Boxcar children help out in a local garden, they dig up one strange thing after another! First, the tomato plants seem to move every day. Find out how that can be.

When someone breaks into Mama Tova's bakery and tries to steal her secret recipe, the Aldens must use their mystery-solving skills--and their taste buds--to solve the case.

Because they do not want to be separated, four orphaned children run away and live in an old abandoned boxcar

When the Aldens agree to watch the house of a local author who has written a book about a vampire, they end up investigating activities that are suspiciously similar to those in his book.

While volunteering at a rescue ranch, the Alden children investigate the disappearance of a few horses.

While staying on a Navajo reservation, the Aldens uncover some artifacts that may be evidence of an ancient village, artifacts that soon turn up missing

When Kayla's tooth disappears before the Tooth Fairy has a chance to visit, her dog King helps her solve the mystery.

When King's favorite blue ball goes missing, he and Kayla must put together clues to figure out where it went.