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.

When their favorite author fails to arrive as scheduled to speak at the local library, the Alden children investigate how he could board a train and never be seen again.

The great detective Seymour Sleuth and his assistant Muggs journey to Egypt to search for a missing stone chicken, an important clue to the location of the Lost Treasure of King Karfu.

The children are staying at the home of a famous inventor who was known for her one-of-a-kind clocks. All the clocks make noise especially at midnight, when there are enough chimes, gongs, and clangs to wake thw whole house up! But the clocks aren't the only sound in the house at midnight. Someone or something is making a mysterious tapping sound. Who could be inventing trouble in the old house?

Four orphans take shelter in an old boxcar during a storm, and, determined to make it on their own, they turn it into a safe, cozy home.

Arnie the talking doughnut is delighted to be Mr. Bing's new pet "doughnut-dog," so when Mr. Bing starts rolling gutter balls during a big bowling tournament, Arnie suspects foul play and sets out to solve the mystery.

Cam helps her friend Eric when he misplaces his permission slip to go on the school field trip.

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.

Scooby and the gang are chasing clues in a haunted baseball stadium.