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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.


Robert Wiemer


Gene Roddenberry (created by), Pamela Gray (teleplay by) | 4 more credits »

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Episode complete credited cast:
Patrick Stewart ... Capt. Jean-Luc Picard
Jonathan Frakes ... Cmdr. William Riker
LeVar Burton ... Lt. Cmdr. Geordi La Forge
Michael Dorn ... Lt. Worf
Gates McFadden ... Dr. Beverly Crusher
Marina Sirtis ... Counselor Deanna Troi
Brent Spiner ... Lt. Commander Data
Rosalind Chao ... Keiko O'Brien
Ben Lemon ... Jev
David Sage David Sage ... Tarmin
Rick Fitts ... Dr. Martin
Eve Brenner ... Inad
Doug Wert ... Jack Crusher
Craig Benton Craig Benton ... Crewman Davis
Majel Barrett ... Enterprise Computer (voice)


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

Plot Summary | Add Synopsis




Official Sites:

Official site



Release Date:

1 February 1992 (USA) See more »

Company Credits

Production Co:

Paramount Television See more »
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Technical Specs


Sound Mix:




Aspect Ratio:

1.33 : 1
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Did You Know?


Jack Crusher was killed in 2354. See more »


This entry originally stated that, when Jack Crusher died, he and Picard wore the older red tunic uniforms, as seen in Star Trek: The Next Generation: Family and subsequently Star Trek: The Next Generation: Journey's End. Yet, in Dr. Crusher's memory, Picard is wearing the uniform from Season 1 and 2. This is because the uniform Jack Crusher wore when recording the holomessage, as seen in Star Trek: The Next Generation: Family, was likely replaced by the Season 1/2 uniform before his death - the appearance of the older uniform during Wesley's vision quest in Star Trek: The Next Generation: Journey's End may have been subconciously triggered by Wesley's memory of viewing the holomessage, and may not be an accurate reflection of the uniform in use at the time Jack Crusher died. See more »


Counselor Deanna Troi: [to Jev] It's not easy having an overbearing parent. Believe me, I know how you feel.
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Referenced in Star Trek: Birth of the Federation (1999) See more »


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

I don't like this episode
21 December 2017 | by yangcaiqiliuSee all my reviews

This episode makes Riker look bad. It is disturbing because they show Riker forcefully force Troi. They did not make it clear whether it is a "memory" or a implanted "memory". Also is disturbing that the alien' trial was not shown.

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