The Enterprise is sent to investigate the disruption of the Gamma VII-A solar system and the destruction of the U.S.S. Intrepid, staffed solely by Vulcans. When they arrive they find a large dark mass floating in space that is draining energy from everything around it, including the Enterprise. Drawn into the mass, they find a huge amoeba-like creature and Kirk must decide which of his two friends, McCoy or Spock, to send into it aboard a shuttle craft on a mission of no return. Written by
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47 reference: Spock states the shuttles' shields will last only 47 minutes See more
As they were approaching the dark cloud, Uhura said she can't receive communication from Star Fleet due to interference which is getting worse, however, moments later Kirk asks Uhura to notify Star Fleet and Uhura reports that the transmission was complete, though interference prevented contact earlier. See more
What is it, Spock? Are you in pain?
Captain, the Intrepid. It just died. And the four hundred Vulcans aboard, all dead.