The Hardy boys investigate when someone tries to prevent a castle in southern France from being converted into a shelter for refugee children.

Joe and Frank investigate some pranks around Bayport, leading them to the Red Arrow, a crime grang.

A banker asks the Hardy Boys to solve the mystery of a secret room in an old deserted mansion.

The Hardy boys find the missing deed to an Indians' land, prevent a phony salesman from carrying through a reckless scheme, and help their father solve a top-secret case.

A chance meeting with a stranger on the road provides the Hardy brothers with a clue to a gang of local burglars.

When they journey to Alaska to help a friend who feels his life is in danger, the Hardy brothers find their own lives threatened.

When valuable electronic parts are stolen from shipments made by Stanwide Mining Equipment Company's cargo planes, the boys go undercover as employees to track down the thief.

While searching in Iceland for a missing sailor sought by an insurance company, the teen-age detective brothers uncover a plot threatening the life of a United States astronaut and the secrets of NASA's moon project.

"It's lights, camera, disaster for a film crew unless Frank and Joe can track down a saboteur in this cinematic Hardy Boys adventure--a fresh approach to a classic series. Joe and Frank Hardy are excited to be cast as extras in the zombie movie that's filming in their hometown. Not only is film production way more exciting than what usually goes on in Bayport, it also doesn't hurt that the lead actress is pretty cute. At first it seems like for once...

The art collector who suspects the Hardy boys of stealing one of his valuable paintings offers them a chance to find the painting and the real culprits.