Billy is making a live TV broadcast of the archaeological expedition of the ancient ruins of Voodah Reef, and sees the professor discover a strange urn with a curse on it protected by a large stone idol. When a series of mysterious accidents begin to occur, everyone thinks it is the curse in action. When the Marvel Family opens the urn they discover a fake jewels inside, and discover that the professor's aide removed the real gems and replaced them with fake ones.; Billy, Freddy and Mary encourage the good Professor to get along home, but he says that he is working on a new discovery and can't. When he fails to show in time for dinner, the tenants of Mrs. Wagner's rooming house go looking for him and all but Billy and Freddy disappear. Suddenly, everyone shows up...all victims of the Professor's new invention! When jewel thieves hit the Van Arch residence, all jewels are returned except a necklace that had been given to Mary to return to Mrs. Van Arch.; Confronting Mary, Billy and Freddy are threatened with death by her, but they capture her and place her in a mental hospital, from which she escapes. Billy and Freddy soon discover that everybody in the boarding house has been replaced with robots, and Freddy quickly joins that group. The robots capture Billy, gather up all the money of the tenants and deliver it to their master, who forces Edgewise to finish Billy's robot. Then he attaches memory transfer caps on each of his victims in order to control them, then plans to murder the real people and use their robots to make money for him.; Billy, Freddy, and Mary find a way to escape their own murders, change into the Marvel Family, and free each of the tenants of the boarding house from the control of Lem Blucher and his robots.; Harry is upset that he hasn't been able to find a good story for his editor, when he is held up. The robber only finds sixty cents on Harry, but Harry opens his big mouth about the $100 in his shoe!; A customer orders lamb chops and insists that the meat come from a young lamb.; The Colonel is having throat problems, so Korny suggests that he see a throat specialist.; The bank is being evacuated by the president because he got a tip that a time bomb had been planted there, and Rubbernose, as the guard, must stay inside. The bank president does give Rubbernose a whistle and tells him to blow it if the bomb does go off.; Daisy invites her uncle to dinner for the first time, and asks how he likes the soup. He says that it tastes peculiar, and she says that maybe it's the soap powder she put into it.