DS9 - Necessary Evil

This is an excellent episode. It combines the humor of a Ferengi episode, with the seriousness of almost any other type of DS9 episode. It is very interesting to watch Odo investigate his first murder case, five years before the time the second season of Deep Space Nine takes place, and even more interesting to find out who actually committed the murder. In this episode we first see how the station looked during the Cardassian occupation. Necessary Evil also makes an interesting comment on the nature of objectivity, as Odo believes that it is possible for him to not take sides between the Cardassians or Bajorans. However, he is unable to do so, although which side he is biased towards depends on one’s viewpoint. This mystery episode is one of best episodes of Deep Space Nine’s second season.