The Secret Agent on Flight

Brothers, Frank and Joe Hardy, embark on two thrilling adventures to solve mysteries and uncover dangerous secrets. In the first, the duo tries to solve a case involving a missing man, a stolen invention, and a dangerous secret agent while traveling undercover on a flight. In their second adventure, the Hardys are shocked when a magician, the Incredible Hexton, offers to reveal his 'Vanishing Man Act' with their detective father as the subject. When their father disappears during the act, the brothers suspect foul play and team up with a US organization of secret agents, SKOOL, to battle an international spy ring, UGLI. The adventures climax with the brothers unmasking the secret agent on Flight 101 and solving the mystery of their father's disappearance.