I forewarn you, if you are about to start the DS9 series, you will have to persevere through the first season, as the cast and writing crew had not found their sea legs yet. But after season one (arguably) the show really started to cement in the story arcs that culminate with this darkly pivotal moment in the Star Trek Universe.

The Federation ostensibly in the Star Trek universe are the good guys – they are us – and that motif is quite evident in the other series that populate the canon. DS9, once it gets going, shifts the moral compass and makes everything more complicated and ethically entangled. It is much more engrossing dramatic experience as this clip illustrates. It is this muddy ethical field that makes DS9, if you can only watch one Star Trek series, the one to watch.