Q's warning about the Borg in Star Trek TNG saved the United Federation of Planets from certain destruction. The Borg's encounter with the Enterprise-D led to Earth's vulnerability being exposed ...

When the Borg were first introduced on "Star Trek: The Next Generation" (in the 1989 episode "Q Who"), they were terrifying. Clearly inspired by the works of H.R. Giger, the Borg sported tubes ...