- A blue supergiant (BSG) is a hot, luminous star, often referred to as an OB supergiant. They are usually considered to be those with luminosity class I and spectral class B9 or earlier, although sometimes A-class supergiants are also deemed blue supergiants.
- Darmok (Wikipedia)
In this episode, the crew of the Enterprise is unable to establish meaningful communication with the crew of an alien vessel, which is resolved by the struggle of the ships’ captains to defend each other from a vicious beast. It is often cited as one of the best episodes of both The Next Generation series and the entire family of Star Trek television series.