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Necessary Evil 

Odo relives some terrible and tragic memories of a past investigation when he was the constable on Cardassian-occupied Deep Space Nine, then named Terok Nor.


James L. Conway


Gene Roddenberry (based upon "Star Trek" created by), Rick Berman (created by) | 3 more credits »




Episode complete credited cast:
Avery Brooks ... Cmdr. Benjamin Sisko
Rene Auberjonois ... Odo
Alexander Siddig ... Doctor Bashir (as Siddig El Fadil)
Terry Farrell ... Lt. Jadzia Dax
Cirroc Lofton ... Jake Sisko (credit only)
Colm Meaney ... Chief Miles O'Brien (credit only)
Armin Shimerman ... Quark
Nana Visitor ... Major Kira
Katherine Moffat ... Vaatrik Pallra
Max Grodénchik ... Rom
Marc Alaimo ... Gul Dukat
Robert MacKenzie Robert MacKenzie ... Trazko


Quark is on Bajor negotiating with a woman, Pallra. She wants him to retrieve a strongbox from the station, hidden behind a panel in the chemist's room. A man is secretly listening to their conversation. With the help of Rom, Quark has no problem finding the box, but his curiosity makes him open it. He finds a list of Bajoran names. Before he is able to copy it, he gets shot by a man - the same man who'd been listening in while Quark spoke with Pallra. While Dr. Bashir tries to save Quark's life, Odo questions Rom. He tells about the chemist's room and Odo is immediately reminded of a murder case several years ago. He was forced by Gul Dukat to investigate the murder of the owner of a shop, Vaatrick. His wife Pallra accused a mistress of the murder. Written by Arnoud Tiele (imdb@tiele.nl)

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TV-PG | See all certifications »

Did You Know?


A scene was deleted from the third act that revealed that Pallra was having an affair with Dukat. See more »


During the flashback scene where Odo first talks to Kira, she calls Odo "constable", but the term was supposedly not known by Odo (as it's an old Earth term) when Sisko 1st met him in season 1, several years after the flashback. See more »


Odo: Commence station security log, stardate 47282.5 - At the request of Commander Sisko, I will hereafter be recording a daily log of law enforcement affairs. The reason for this exercise is beyond my comprehension, except perhaps that Humans have a compulsion to keep records and lists and files. So many in fact, that they have to invent new ways to store them microscopically. Otherwise their records would overrun all known civilization. My own very adequate memory not being good enough for ...
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Star Trek: Deep Space Nine - Main Title
Written by Dennis McCarthy
Performed by Dennis McCarthy
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User Reviews

Great origin story episode!
31 July 2020 | by hughnwilliamsSee all my reviews

We get to see the origin story between Odo and Kira, meeting for the first time under dramatic circumstances, as well as an interesting look at DS9 under Cardassian occupation. An intriguing little murder mystery to boot and this is a really fun episode to watch. DS9 at its best (so far, only Season 2).

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Release Date:

14 November 1993 (USA) See more »

Company Credits

Production Co:

Paramount Television See more »
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Aspect Ratio:

1.33 : 1
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