Star Trek Nemesis

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Vice Admiral Kathryn Janeway contacts Picard and orders the Enterprise on a diplomatic mission to nearby Romulus. Janeway explains that the Romulan Empire has been taken over in a military coup by Shinzon, who says he wants peace with the Federation and to bring freedom to Remus. On arrival, they learn Shinzon is a clone of Picard, secretly created by the Romulans to plant a high-ranking spy into the Federation. The project was abandoned when Shinzon was still a child and he was left on Remus to die as a slave. After many years, Shinzon became a leader of the Remans, and constructed his heavily armed flagship, the Scimitar. Initially, diplomatic efforts go well, but the Enterprise crew discover that the Scimitar is producing low levels of thalaron radiation, which is what had been used to kill the Imperial Senate and is deadly to nearly all life forms. There are also unexpected attempts to communicate with the Enterprise computers, and Shinzon himself violates Troi's mind through the telepathy of his Reman viceroy.