Fenton Hardy, the famous private detective and father of the Hardy Boys, asks his sons to help him with his latest case involving a criminal named Snattman and the illegal drug trade smuggling of stolen drugs. Hardy directs Frank and Joe to a house on the cliff, whose location overlooking Barmet Bay offers an excellent vantage point to watch for smugglers. The Hardys are tricked into the house by cries for help, and are trapped for a short time in...

CAN THE HARDYS PASS THIS EXTREME TEST OF ENDURANCE AND SKILL? Making it to the finish line of the high-endurance Fire Creek Mountain Race is going to be a real challenge for the Hardys. The five demanding events include downhill mountain biking, kayaking, cross-country hiking and climbing, biking through the city streets of Montreal, and a high-speed SeaZoom race on Lake Champlain. But when dangerous accidents begin to interfere with the events,...

The Hardy boys' search for stolen gold leads them to an abandoned mine where, in the depths of the earth, they are attacked by outlaws.

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

While Frank and Joe help their father locate a notorious jewel thief, they also explore the mysterious death of a tycoon's nephew years before.

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.