Sigma Draconis VI Sigma Draconis VI was the inhabited sixth planet in the Sigma Draconis system . Classified as M - class , the planet was the home of the Morg s and Eymorg s . The planet had one moon . The position and orbit al path of Sigma Draconis VI was depicted on system maps that were displayed on the main viewscreen of the bridge in 2268 . In that year , this planet was several thousand years into a glacial age , with a maximum high temperature of 40 °F . Only a small tropic zone existed on the planet that remained ice - free . Sentient life was plentiful on the planet , but on a most primitive level . According to probe s , the planet had no signs of industrial development or organized civilization . As the probes detected primitive humanoid s at irregular intervals , the instrumentation of these spacecraft also detected regular pulsations of generated energy . Overall , however , Sigma Draconis VI was a remarkable example of a retrograde civilization . At the peak , it was advanced beyond 23rd century Federation capabilities , but had de - evolved to primitive level , beginning 10 , 000 years ago when a glacial age reoccurred . An underground complex was developed for the women , while the men remained above , causing a male - female schism . This ultimately caused a cultural development which was last seen on old Earth when the Roman s were warring with barbarians . The visited the Sigma Draconis in search of Spock ' s brain . Once reaching the system , Uhura detected high energy generation on the planet . Kirk took a gamble and beam ed down to the planet ' s surface . Almost immediately they encountered five male humanoid natives , known as Morg s . The foundations for a dead and buried city were later found near an elevator built into a cave . Several hundred meter s below the surface , they discovered a highly complex civilization built around the high energy generation source , based on ion power . This civilization was discovered to be the home to what the Morgs referred to as the " givers of pain and delight , " otherwise known as the Eymorgs . The civilization , itself , was controlled by the Controller , which was responsible for keeping the Eymorgs alive for a period of 10 , 000 years , and for whom the Eymorgs lived to serve . Following the disconnection of the Controller ( which was " powered " by Spock ' s brain ) , by the crew of the " Enterprise " , the Morgs and Eymorgs were forced to live together once again , in a forced attempt to re - establish a civilization . ( ) Background information . For the remastered version of the episode " Spock ' s Brain " , an all - new computer - generated version of Sigma Draconis VI was rendered . The new , more realistic planet featured landscape more consistent with the look of the surface . Specifically , its non - ice - covered portions were changed from a blue hue that suggested large oceans to an ocher that matched the color of the surface . The glacier - free areas were also more narrowly concentrated around the tropics of the planet , as the script suggested they should have been . In addition to new shots of the " Enterprise " entering and leaving orbit of the planet , old footage of the landing party beam ing to the surface was tracked into a brand new matte painting which expanded the scope of the original shot , showing a more mountainous and snow - covered landscape . While in command and recording his only log entry in TOS , Sulu inadvertently called the planet " Sigma Draconis VII " . Kirk also inadvertently refers to the planet as " Sigma Draconis VII " in his own later captain ' s log , even though he himself referred to the planet as " VI " twice earlier in the episode . According to " " ( pp . 18 , 19 , 34 , 44 ) and " " ( " Federation Historical Highlights , 2161 - 2385 " ) , the Sigma Draconis system was located in Sector 004 ( Sigma Draconis sector ) , in the Alpha Quadrant . The Morg and the Eymorg formed a congress in 2268 after the crew of the reintegrated the civilization . In 2370 , there were an estimated 1 . 3 million Morg and Eymorg living on Sigma Draconis VI . This was a Federation system in the late 24th century .