Because Simba has renounced his evil past and confessed his thefts to Major Farr, he is put on probation in the Major's care. However, the evil Dr. Karno is not about to let Simba get away with that, especially since Simba has put the Police on the doctor's trail. With the help of Grof, the doctor kidnaps Simba from Farr Academy, takes him to his lab and operates on his brain to make him cruel and vicious.; A group of river pirates attack a ship in order to get to Dr. Waring, who is carrying a casket of radium aboard ship for the Scientific Foundation, and which they intend to hold for ransom.; A medium named Gondo convinces wealthy Mrs. Howard that he can make contact with her late husband Horace, but she is unaware that it is a hoax concocted in order that her nephew will be given her million dollar estate.; While taking the Sub out on its first test flight, Jack and Slim note a black cloud amongst all the white ones, a cloud which fires a huge lightning bolt at them!; Blue Bolt takes Lois, as his new helper, to see Dr. Bertoff to see if the scientist has been able to locate the A.C. Ring, the purveyors of fake citizenship papers. Bertoff decides to give some the Blue Bolt's powers to Lois as she aids him in combating and rounding up the vicious ring.; Twister comes upon the scenes of an airplane attacking a car and watching a group of crooks take a black bag from that car. When he talks to the dying driver of the car, he discovers the gang has made off with the Monger Jewels, which were being transported by the man to Washington.; The Rider and Cloud assist in saving a girl from Dirk Gray and his henchm,en, who have learned that the girl's father has discovered a vein of gold in Skeleton Valley, and they want to prevent him from filing a claim on the vein in the morning.; Eddie and Jerry, having won a trip to the island of Tago Tago and wanting to see all the sights. hire a glass bottom boat. They spot a cruise ship and the passengers on board throwing coins into the water for native divers to retrieve. However, when one of the divers is swamped and hit by a boat, the boys rescue him.......in gratitude, the man gives the boys a black box he found in the waters. When they open it, they find a mysterious map inside.; Set adrift in a boat, Krisco, Jasper and the Captain are rescued by a submarine and given medical treatment. Soon, they show their appreciation by volunteering to dislodge the sub's anchor, which is entangled in a giant clam, and discover that the sub has entered into an enemy minefield!; Cap tells his pal Joey that the term "blitzkrieg" is not a new one, but one that originated with a famed General back in 1779, who stormed an impregnable for called Stony Point and took it, using the same tactics the Germans were using in their campaigns.