The six horrible Herdman children create mayhem during Halloween.

When a puppy who is being trained as a police dog goes missing, third-grader Judy forms a detective agency to solve the mystery, imitating her literary heroine, Nancy Drew.

Hannah is delighted to receive a Dalmation puppy, Oscar, just before Christmas. She wishes she could spend all her time with her gorgeous puppy, but she has her school Christmas play to rehearse. Meanwhile, Oscar feels lonely and neglected. Why doesn't Hannah want to be with him any more?

When Brother and Sister Bear help teach some younger cubs how to play T-ball, they learn a lesson in patience.

The Alden children have another mystery to solve when they visit a castle and must figure out which of the guests has stolen the Stradivarius violin.

While staying at an eighteenth-century inn in Vermont, the Boxcar children become curious about the mysterious "accidents" that keep plaguing the owners.

When the Alden children set out to solve a jewelry store robbery, they find they must also deal with a mysterious thief who steals their favorite cereal.

Brother Bear likes to tease his sister, but when he's the one who is taunted at school, he understands why Sister gets so mad.

The Boxcar children investigate when ice cream and other items start disappearing from their favorite ice cream parlor.

Henry, Jessie, Violet, and Benny arrive at the Alamo to find that a movie is being made there -- and they are going to be in it. But then things start to go wrong on the movie set, and a priceless ring from the Alamo museum disappears. Are the two things connected? It is up to the Boxcar Children to solve this new puzzle!