The Green Mask, alarmed at the Tong wars erupting in Chinatown, seemingly joins forces with the nefarious San Sin in order to find a way to rescue Fong Lee's daughter from his evil clutches.; A mysterious plague threatens to destroy all life on Earth, and the only cure is radium: but the Earth doesn't have sufficient quantities in order to deal with the disease. Therefore, Rex and Cynde head to the Planet Capris to obtain the valuable material.; River pirate Chang orders his thugs to capture Kendall and take him to the mysterious River Lily aboard the "Dragon Heart".; The airplane carrying Captain Anthony and Sir Chandler is suddenly attacked by other aircraft, and forced to land, the purpose of which is to force two opposing nations to sign a pact with each other.; Lt. Drake is put onto a case involving the smuggling of oriental aliens into San Francisco, and he discovers that the aliens are being sewn into large fish to avoid detection..; Zanzibar investigates the theft of the famed statue: the Venus de Milo.; Hemlock and the good doctor visit Spookington Castle in order to try and collect a $10 reward for the return of the kidnapped Mrs. Spookington.; As the Waco Kid rides along, he spots a wanted poster: on himself, for bank robbery and murder!; Bancroft is summoned by letter to a derelict house, to find a dying man who says he was shot by a Baron Garza. Investigating, he discovers the Baron and his thuigs are behind a gun smuggling racket.; A group of thugs rob an armored car of its $80,000 payload and capture the Beetle in the process.; Captain Scott and James enter the town of Gulam, unaware that a sinister figure named Kahn and his men are out to kidnap the boy.; Wing is called in to discover the whereabouts of six missing transport planes.; Butch and his pal see easy dough by snatching Billy for ransom.