Star Trek Deep Space Nine
In short
An American science fiction television series that aired from 1993 to 1999. It follows the crew of a space station located near a wormhole in the 24th century.
In plain words
The show is about life on a space station rather than a moving starship. It focuses on politics, war, and the different people living on the station. It is the fourth show in the Star Trek series.
A simple example
Instead of exploring new planets every week on a ship, the characters deal with the daily problems of running a station and managing trade.
Why it matters
It changed the Star Trek formula by using long, continuous storylines instead of separate adventures. It also introduced more complex themes like religion and the morality of war.
Easy to mix up
Do not confuse it with Star Trek: Voyager, which follows a ship lost in deep space.