When a navy fighter pilot disappears while test flying the latest high-tech aeronautics design, the aircraft's designer is certain that the pilot is a spy who has kidnapped the plane, and the Hardy boys step in to investigate.

The Hardys' Christmas in paradise, Hawaii-style, could turn out to be one big wipeout. Checking out the world-famous dolphin research center at Nai'a Bay, the boys discover that one of the dolphins has suffered a suspicious injury, and that one of the researchers has vanished without a trace. Frank and Joe are convinced that the disappearance is linked to the notorious Hawaii Heist, a cache of hot jewels that was lost at sea in a plane crash. The...

On the trail of an arsonist trying to ruin developer Donald Pierce, Frank and Joe Hardy go undercover as firefighters and turn the heat on three different suspects.

The Hardys are competing in the Suntex Solar Challenge, a race of super-charged, solar-powered cars across the Arizona desert.

Frank and Joe have volunteered to do undercover security work at the Bayport Winter Festival. They run into some masked, gun-wielding thugs who steal money intended for the local children's hospital.

"The annual Computer Horizons convention has brought the Hardys to New Orleans. The trouble begins in a jazz club down on Bourbon Street. Together with their friend Vanessa, they run into Billy Barta, a local guy from the convention, and its' one encounter they'll never forget ... Billy asks Vanessa to dance, Joe gets jealous, then gets into a fight. The next day Joe gets arrested - for the murder of Billy Barta! Billy Barta was into some serious...

Ben Martin has won five million and his sister is kidnapped for a ransom showing how hard cash can bring out cold-hearted schemes.

Frank and Joe get revved up to race for their lives! The Hardy boys and their friend Jamal are thrilled to be participating in a motorcycle exhibition. It's going to be an exciting weekend, with many talented cyclists heating up the competition and a valuable prize for the winner -- a classic motorcycle! But when burglaries and suspicious accidents send the benefit skidding out of control, Frank and Joe find themselves racing to crack another case....

While participating in a Revolutionary War reenactment, Frank and Joe learn that there has been a real casualty and set out to investigate the incident.

Frank and Joe witness a parasailing accident in the middle of New York City and must work fast to catch the murderer before another "accident" occurs.