Transporting three Ullian mind-probing historians, the Enterprise crew is stymied when some of its members fall into a coma. Deanna Troi, the first crew member to come through it, cannot recall anything surrounding the incident.



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Episode cast overview:
Ben Lemon ...
David Sage ...
Dr. Martin
Craig Benton ...
Crewman Davis


On a mapping journey the Enterprise hosts a party of Ullian 'mind historians', specialists who telepathically retrieve people's long-forgotten memories from many races. Keiko O'Brien and Dr. Crusher enjoy resuscitating pleasant memories, but the Ullian leader Tarmin's frustratingly overbore son Jev abuses his abilities on non-volunteers, against their code, and enters their thus nightmare-altered memories as a key character, leaving Troi and Riker in an apparently unprovoked coma which only resembles the rare neurosis irizine, without the associated histamine level change. Then it happens to Crusher the bad way, but Troi wakes up after three days, alas with a total black-out. After eliminating any other imaginable cause, Picard has to suspect the Ullians, Troi accepts a memory probe by Jev, who makes her believe it's Tarmin's doing, but Geordi and Data do some research... Written by KGF Vissers

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Release Date:

1 February 1992 (USA)  »

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Sound Mix:


Aspect Ratio:

1.33 : 1
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Did You Know?


This is the only episode of either Star Trek: The Next Generation (1987) or Star Trek: Deep Space Nine (1993) in which Keiko O'Brien (Rosalind Chao) appears but her husband Chief Miles O'Brien (Colm Meaney) does not. See more »


Doctor Crusher refers to the thalamus as "the part of the cerebral cortex involved in memory function." However the thalamus is not part of the cerebral cortex, and is not considered all that vital to most memory processes. See more »


[last lines]
Tarmin: It's been three centuries since we treated anyone for this... this form of rape. But there are medical records from that era. It was a time of great violence for my people, a time we thought we had put far behind us. That this could happen now... It's unimaginable.
Captain Jean-Luc Picard: Earth was once a violent planet, too. At times, the chaos threatened the very fabric of life, but, like you, we evolved; we found better ways to handle our conflicts. But I think no one can deny that the seed of violence ...
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References Star Trek: The Next Generation: Shades of Gray (1989) See more »


Star Trek: The Next Generation End Credits
Composed by Jerry Goldsmith and Alexander Courage
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User Reviews

I could see this episode upsetting a lot of folks...
22 November 2014 | by (Bradenton, Florida) – See all my reviews

In this episode, a race of strange people who can read people's thoughts and memories come aboard the ship. Oddly, during their time on the ship, various crew members fall into comas--and they undergo extremely vivid and traumatic brain probings. In one of these, Troi is 'mind raped'. Can the crew figure out exactly what's happening?

This episode is one I would caution people about watching. If you've been a victim of sexual assault, seeing the rape sequence could easily be very traumatic--perhaps too traumatic. And, even if you were never a victim, the show is supposed to be entertaining-- and what the heck is entertaining about this?! Because of this, it all seems a bit exploitative and unsavory. Plus, as some have pointed out, there doesn't seem to be any definite resolution. Rather unsatisfying and one I urge you to think about twice before watching.

4 of 7 people found this review helpful.  Was this review helpful to you?

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