10 Most Intense Star Trek Scenes

In this first season episode of Deep Space Nine, guest star Harris Yulin delivers a masterful performance as Amin Maritza, the Cardassian filing clerk, consumed with guilt over the Occupation of Bajor. His breakdown toward the episode's end was also a strong contender for this list, but it is his earlier speech that nabs this spot.

While he is outlying 'his' actions, the audience still believes that he is Gul Darheel, the so-called 'Butcher of Gallitep'. Therefore, hearing him confess to ordering his soldiers to kill 'Bajoran scum,' and their return being bathed in blood, was a terrifying thought.

Nana Visitor perfectly sells Major Kira's horror, declaring him insane. Maritza, at this point, doesn't hold back. 

Now why did they feel that way Major? Because they were clean.