The Ray and Bud temporarily join the circus after saving some aerialists from attack. In the process, they discovered an FBI agent was also there to take down Vera, the equestrienne.; Hazzard and Bozo face a group of weird mobsters who wear special suits to make themselves look headless in order to scare their victims to death.; A circus performer uses monkeys as pickpockets, which draws Dave away as Midnight from his date for the evening, and he is in the process of busting up the racket when Doc and Gabby come on the scene, intent on using the doctor's new mind-reading invention on the gang.; Nick Perselle tries to frame Mulligan for murder.; Thurston battles spies intending to sabotage the Panama Canal.; Barry meets his heart throb, Judy Wilson, while protecting her brother from mobsters.; Wings dons the costume worn by the enemy spies to sneak into their Invisible Sky-Base.; Abdul is ship wrecked on a mysterious island and sentenced to be sacrificed to the Fire God; Framed for murder, Chic Carter dons a mask to evade the police.