The Enterprise traces a virus-like outbreak that seems to be traveling in a direct line across a planetary system. The next planet is home to Kirk's brother Sam, his sister-in-law and their young son. The Enterprise arrives too late however for Sam. They find flying jellyfish-like creatures that attach themselves to humans. They take over the victims nervous system forcing them to bend to their will. Spock finds a weapon to use against the creatures but it leaves him hopelessly blind. Written by
Did You Know?
When Uhura is speaking to Kirk about the message sent from the colony, her earpiece disappears when she is filmed from behind and reappears when her face is shown again. See more
I did it! It's finally gone! I'm free! I'm...