The Hardy Boys investigate a series of mysterious break-ins at a resort in North Carolina, which appear related to the theft of four giant gemstones from a museum.

Frank and Joe go to Seattle to help their father, who is accused of murder.

On a trip to a Rocky Mountain resort, Frank and Joe see a strange green light in the sky followed by the disappearance of three people including Joe.

The Hardy boys investigate when someone is determined to sabotage the Silver Star bicycle in the Bike-Aid cross-country race.

Frank and Joe pose as a pair of crooks looking for a safe hideout in order to crack a criminal ring called Perfect Getaway Travel, Ltd.

Frank and Joe Hardy are headed for a high-seas showdown when their trip to the Everglades for the Swampland Rodeo lands them in the middle of a Miami crime spree.

Frank and Joe Hardy's visit to their friend Chet Morton, a young man who has taken a job posing as a Viking in a historically authentic village in Minnesota, is marred by a saboteur who is set on displaying a more sinister side of the ancient culture--burning, looting, and terror.

Sent on a secret mission to warn a federal witness who is being hunted by a hit man, Joe is ambushed along the way and loses his memory. He mistakenly thinks Frank is the enemy.

Frank and Joe Hardy are drawn into a tangled web of danger when they are called in to investigate mysterious accidents plaguing a college football star.

The Hardy brothers travel from the highways of eastern United States to tropical islands trying to track down truckloads of precious cargo that are being hijacked.