The mysterious disappearance of a reclusive neighbor's cat involves the Boxcar children in some complicated detective work.

While helping run Jerry Taylor's general store, the Alden children investigate his mysterious employee Nancy.

The Alden children, isolated in a storm at a small bus station, are led into a mystery centering on a polluted river.

While canoeing and backpacking near Timberwolf Lake, the Aldens receive strange warnings to stay away from the area and stumble upon clues to a missing cache of stolen coins.

Four orphaned children make a home for themselves in an abandoned boxcar and are united with their grandfather.

Someone is trying to put Aunt Jane's motel out of business, but the Alden children aren't going to let that happen.

While on a bicycle trip to their aunt's farm, the four Aldens help solve a mystery.

Henry, Jessie, Violet, and Benny are spending the summer traveling on a train -- in their own caboose, Number 777. At one train stop, a man startles the Boxcar Children when he runs away after hearing the number of their caboose. It isn't long before the Aldens learn the mysterious history behind caboose Number 777 -- a history that involves a circus clown, a high wire artist, and a valuable necklace. Come aboard and join the Boxcar Children in the...

When their grandfather arranges for them to spend two week at Sunny Oaks, the four Alden children enjoy settling into the routines of farm life but become suspicious about a mysterious horse locked in the stables.

When an elderly friend is injured, the Alden children offer to help him with his window-washing business in their small town of Greenfield and agree to help him solve a riddle that has arrived in a mysterious invitation.