When the Hardys' wealthy neighbor is robbed, Joe and Frank are asked by their father to help solve the case.

Joe Hardy is kidnapped by a gang of jewel smugglers as a warning for the Hardy Boys' father to stay away from their operation.

Frank and Joe, the Hardy boys, solve a mystery involving a magician, American secret agents, and international spy ring, and a Scottish castle.

Triggered by the disappearance of a brilliant young professor, this mystery takes the Hardy boys first to Kenworthy College, where they find a puzzling message on an examination paper. But then their pal Chet Morton, with his new metal detector, and buddy Biff Hooper, turn up a clue that sends the young detectives on an exciting search in another direction -- to the Honeycomb Caves, on the seacoast. A hot-tempered hermit who considers the caves his...

It's winter in Bayport, but things are heating up at the Morton family farm. It looks like someone is wreaking havoc with the property, and Chet and Iola Morton are worried that their grandparents are in danger of losing it! With their parents out of reach, the Mortons call on Frank and Joe Hardy for help. They need to figure out who's behind the trouble -- and fast. The Hardys are hot on the trail, but the Mortons' grandparents do something unexpected...

Frank and Joe Hardy must join the cast of a new reality show called Deprivation house, featuring a group of teens competing to see who can survive the longest without modern luxuries, and determine who's behind the death threats received by other contestants.

Suspecting that their friend has been swindled, the Hardy brothers investigate and find themselves on the trail of a much larger criminal operation. Frank and Joe Hardy suspect that their best friend Chet Morton is the victim of a summer school swindle and offer to help get his money back. While probing a baffling burglary at the Seneca Indian Reservation in New York State they investigate Zoar College located nearby. Clues that Frank and Joe uncover...

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.

Hired to locate an old Spanish cannon, the Hardy brothers uncover an even greater treasure after perilous underwater adventures.