The 3 Formulas of Professor Satō is an adventure left in two albums of comic strip of the series Blake and Mortimer created by Edgar P. Jacobs. This is the last chronological story with the sworn enemy because Olrik seems this time to die well in the explosion of his helicopter. The first volume was made by Edgar P. Jacobs and appeared during his lifetime while the second one contained only pencils of his hand. Thus the work interrupted by the lack of motivation and the health problems of Jacobs, remained unfinished and the readers had to wait for 13 years to know the epilogue. It was finished by Bob de Moor to be able to be published. A ryu, a dragon flying Japanese legends, causes a fatal accident with a military plane in the sky of Tokyo. This simple fact enough to awaken the curiosity of Mortimer, then on a conference tour in Kyoto, but here we successively try to remove it and then make it disappear. These events in appearance unbound, it is a possible to reproduce an electronic plane, and it is in fact a disaster of a possible Mortimer. The professor Satimer, on a conference tour in Kyoto, but here we try to remove it and make it disappear it disappear. These events in appearance to disappear. Sato reveals to him that the essence of his invention is three formulas, which he has taken the precaution to distribute to three different banks. Feeling threatened, he gives Mortimer the power of attorneys which will allow him, if necessary, to enter into possession of the famous documents. But Kim, Professor Sato's assistant, surprises this capital conversation and warns... Olrik, Blake's eternal opponent and Mortimer, who managed to bribe Sato's unscrupulous second. Mortimer, fearing Kim's betrayal and Olrik's involvement in all these events, warns his friend Blake to join him in Tokyo. But Olrik decided to take him by speed and fomented a diabolic plan to seize without a blow the three formulas: to use a robot in the image of Mortimer to deceive the banks, after having put the scientist out of his condition to harm...