A desperate Trill tries to steal the Dax symbiont.


"Station log, stardate 47182.1. DS9 has been temporarily evacuated due to a violent plasma disruption. Until the disturbance ends, we'll be forced to maintain the station with a skeleton crew."

At a time when Deep Space 9 is all but empty, an unjoined Trill named Verad and his crew (a pair of Klingon mercenaries T'Kar, Yeto and former prostitute Mareel) overpower the crew of the station. The Trill, Verad, applied to be "joined" and was rejected; now he wants the Dax symbiont. Forcing Odo into a container and taking the rest of the crew hostage, he forces Bashir to transfer the symbiont into his body, which will kill Jadzia within hours.

Bashir has Yeto act as a nurse as he tries to save Jadzia's life. Meanwhile, Sisko tries to coax his old friend (Verad now has the memories of both Jadzia and Curzon Dax) into setting things right, but he realizes Verad intends to let Jadzia die. Verad's lover begins to realize how much Verad has changed since the symbiont was transferred and he became Verad Dax, and begins to think the transfer may have been a bad idea. However, she continues to remain loyal to him.

Quark, who is responsible for Verad and his crew boarding the station, pretends to be injured so Bashir can knock one of the Klingons out. He then cracks the lock on the container Odo is in. Once Verad realizes what has happened, he heads for his ship and takes Kira as a hostage.

By the time Verad reaches his ship, Odo has released the docking clamps, leaving him stranded. Kira and Odo overpower T'Kar who is holding her but in the confusion Verad slips away, heading for a runabout. In the mean time his lover has realized that the man she loves truly is gone and has decided to help Sisko. Sisko meets Verad at the airlock to the runabout and the two have a stand off. Believing that Sisko will not shoot his old friend, Verad begins to walk away, but Sisko shoots him, declaring, "Don't call me Benjamin." The Dax symbiont is transferred back to Jadzia, while Verad is clearly shaken up about losing Dax. As he lies in the infirmary in shock and sorrow, he is comforted by Mareel.

Memorable quotes

"He couldn’t find a cup of water if you dropped him in a lake but, even if he is an idiot, he’s still my brother."

- Quark

"I’ve struck the sails and battened the hatches, so to speak."

- Bashir

"The Empire is governed by doddering fools and frightened old women who aren’t worthy of the name “Klingon.”"

- T'Kar

"It’s such a pleasure doing business with Klingons."

- Quark

"Either you help me, or you and your friends will die."

- Verad to Bashir

"Thank you, Doctor. I feel better already."

- Quark, after Bashir sedates Yeto

"It's a gift."

- Quark, after unlocking Odo's container

"She let herself be slaughtered like a mindless t’gla.  If she wanted to live, she should have fought back."

- Yeto, to Bashir

"Don't call me Benjamin."

- Sisko, to Verad

Background information

Story and script

  • Robert Hewitt Wolfe says that this show was created because the producers wanted to convey to the audience the idea that not every single Trill was joined, that it was actually extremely difficult to get a symbiont. This, in turn, offered a commentary on the Jadzia character insofar as she was someone who did become joined. [1]. The third season episode "Equilibrium" expands on the highly selective and exclusive process of joining. It is explained that if the widespread compatibility of most Trill with symbionts was known, violent attempts at joining such as Verad’s would be far more common.


  • The symbiont seen in this episode is significantly different from that seen in TNG: "The Host". As makeup supervisor Michael Westmore explains, the original design was based upon a caterpillar with an octopus' head, but for its second appearance in DS9 (the first was in the pilot "Emissary"), the design was "streamlined." (Michael Westmore's Aliens: Season Two, DS9 Season 2 DVD, Special Features)
  • On the scene featuring the Trill symbiont, David Livingston commented, "We didn't want it to look cheesy. It was always a problem showing it. It's that whole idea of Alien; you don't really want to see it too much because the audience is either going to be repulsed by it or say it's too hokey. (Captains' Logs Supplemental - The Unauthorized Guide to the New Trek Voyages)
  • During filming, Tim Russ accidentally punched Patricia Tallman (who was doubling Nana Visitor) in the face during a fight sequence. Tallman noted that "everyone on the set freaked out, but I said, 'No, don't stop! That was really good - it looked very authentic!' So we finished the fight there and then." (Star Trek Monthly issue 52)


  • Ira Steven Behr commented "Glover was great, but so was Megan Gallagher. I thought she was just wonderful. It was one of my favorite shows of the season. I love the stuff with Verad becoming Dax and the scene with him and Sisko where he's suddenly his friend. It was very interesting material and well played. Les Landau did a wonderful job with that show". (The Deep Space Log Book: A Second Season Companion, p 21)
  • Robert Hewitt Wolfe commented "I'm really pleased with ["Invasive Procedures"]. John Glover as Verad turned in a tour de force performance. Avery, as usual, was great. Les Landau gave it excellent direction. It was neat to do this kind of film noir study of our characters. It was especially good for Bashir, who shows he's not only a competent doctor, but he's tough, too. He stands up to the Klingon, then, later. The episode showed a part of Bashir that we hadn't seen before". ("Robert Hewitt Wolfe - writer/story editor", The Official Star Trek: Deep Space Nine Magazine Vol. 5, p. 62-63)
  • Michael Piller commented "I've been extremely pleased with the growth of Terry's performance. I thought she was very touching in this episode, and the ensemble really worked together very well. John Glover was terrific. We basically took our cue from shows like The Petrified Forest and Key Largo." (Captains' Logs Supplemental - The Unauthorized Guide to the New Trek Voyages)
  • This is one of Terry Farrell's favorite episodes because she believes it is very important in terms of differentiating between the host (Jadzia) and the symbiont (Dax); "I approached the scenes in the Infirmary with the idea that Jadzia is scared, that she feels helpless. She cares very deeply for everyone on the station and is afraid for them. That's why she's willing to say 'Fine, I'll give my life for everybody, and you can have Dax.' But that had been while the strength of Dax was inside of her, telling her that everything was going to be okay. Once the worm is gone, she's only twenty-eight years old, and it's like, 'Wait, I haven't lived that much life yet'." (Star Trek: Deep Space Nine Companion)
  • When asked after leaving Star Trek: Deep Space Nine who her favorite guest was, Terry Farrell commented "John Glover, absolutely. He was Verad in "Invasive Procedures", the guy who stole my Dax symbiont. He's such a great actor and I was so psyched that he did our show. He said somewhere that he liked working with me, and I was so excited and flattered to hear that". ("Farrell's Fate", Star Trek Monthly, issue 43)
  • Armin Shimerman dislikes this episode because he feels that Quark commits an unforgivable crime yet receives no punishment. According to Shimerman "I worry when Quark doesn't get punished for really sizable crimes. It makes the character less important since his acts trigger no consequences, and it makes Odo look a little foolish, in that he's the law keeper and he can't get this little troll punished." (Star Trek: Deep Space Nine Companion)
  • Megan Gallagher commented that "Invasive Procedures" had "a good back story. I loved working with John Glover. The whole cast was great. Nana (Visitor) and I had a cool fight scene to do. She has a theater background and I have a theater background. I’d studied stage fighting and combat and all of that. So that was fun, going into your tool box and using something you paid a lot of money to learn how to do". [2]


Video and DVD releases

Links and references

Main cast

Guest stars

Uncredited stunt doubles


Andorian redbat; auricular lobe; Bajoran wormhole; Bolarus IX; Cardassians; Cliffs of Bole; contusion; Dax symbiont; Dax, Curzon; Dax, Tobin; Dax, Verad; Delgorian locking mechanism; delta-wave inducer; docking ring; Ekina; endorphin; Federation; Ferengi; Gamma Quadrant; Kela; Klingons; Klingon Empire; Kustanovich; latinum; Livingston, USS; malleus; Orinoco, USS; Pelios Station; Promenade; Quark's; runabout; runabout pad; security grid; Senarian egg broth, skeleton crew; spitting; Treaty of Alliance

External links

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