Frank and Joe Hardy search for the Great Marconi's kidnapped assistant and stumble into a world where nothing really is as it seems.

Frank and Joe Hardy investigate the disappearance of several teens at a "tough love" western camp.

Frank and Joe go undercover at a major skateboarding contest in Venice, California, to try to find out who is killing off the competition.

Frank and Joe take a fun trip across country on a new bullet train and end up in the middle of a nightmare where they are blamed for everything,

Frank and Joe go undercover to discover why teen seamen on an old fishing boat keep going missing. Is one of the crew responsible?

At a nationwide drama competition, Frank and Joe Hardy go undercover to discover which contestant wants to win by any means possible -- including