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For other uses, see Necessary Evil.

"Necessary Evil" was the 28th episode of Star Trek: Deep Space Nine, the 8th episode of the show's second season, first aired on 14 November 1993. The episode was written by Peter Allan Fields and directed by James L. Conway.


After an assassination attempt on Quark, Odo reopens a five-year old murder case—in which Kira Nerys was the main suspect.



Julian BashirBroikJadzia DaxSkrain DukatJones (Lieutenant)Kallis VenKira NerysOdoQuarkRano DakeRomBenjamin SiskoTrazkoVaatrik DrasaVaatrik Pallra
Referenced only
Hadar (Cardassian)Ches'sarro SeetoMora PolNogJake Sisko

Starships and vehicles

Danube-class runabout


Bajorchemist shopDeep Space 9habitat ringoperations centerPromenadeQuark's
Referenced only
Gamma QuadrantMeldrar I (Meldrar star system) • ore processing facility

Races and cultures


States and organizations

Bajoran MilitiaBajoran ResistanceBajoran War Orphans FundCardassian GuardCardassian UnionStarfleetUnited Federation of Planets
Referenced only
Cardassian High CommandBajoran Institute of Science

Other references

advocatebasotileblack marketblackmailCardassian aleCardassian neck trickchocolatecollaboratorconstablecortical stimulatorcortolinduraniumFerengi Rules of Acquisitionholosuiteicelatinumlitamagnasitenucleonic radiationOccupation of BajorPADDprostitutionPyrellian ginger teashapeshiftertetryonTriskelion cargo


Related media


Notable cast and crew




published order
Previous episode:
Rules of Acquisition
DS9 episode produced Next episode:
Second Sight
Previous episode:
Rules of Acquisition
DS9 episode aired Next episode:
Second Sight
chronological order
Previous Adventure:
Dyson Sphere
Pocket Next Adventure:

External links