17 user 8 critic


When an approaching alien ship wipes their memory, the crew struggles to put back together what happened.


Les Landau


Gene Roddenberry (created by), Barry M. Schkolnick (teleplay by) (as Barry Schkolnick) | 1 more credit »




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. Cmdr. Data
Erich Anderson ... Cmdr. Keiran MacDuff
Michelle Forbes ... Ensign Ro Laren
Liz Vassey ... Kristin
Erick Weiss ... Crewman
Majel Barrett ... Enterprise Computer (voice)


The Enterprise is heading for the Epsilon solar system. A suddenly approaching alien ship uses scanners so strong that all crew members including Data lose most of their personal memories, even names and ranks, yet retain their operational and language skills. The external communications are down and computer data banks have been selectively wiped. Some, including the ship's manifest, are altered, so as to make a Commander MacDuff Executive Officer (rather than Riker) and the Enterprise is on a crucial mission in a war the Federation had been conducting for years against the Lysian race. The alien ship has been destroyed, they assume by the Enterprise, although there's no battle damage. While crew members behave differently, failing their normal reference patterns, MacDuff volunteers for a memory therapy Dr. Crusher suggests, so he can pretend for it to fail and press on the attack on the Lysian headquarters, but the war logic doesn't quite add up. Written by KGF Vissers

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TV-PG | See all certifications »

Did You Know?


The episode won an Emmy Award for Outstanding Special Visual Effects. See more »


When Ro arrives at Riker's quarters, interrupting him and Troi, she uses the chime, requiring permission for access. However, she was able to enter his quarters earlier without him even being there at all. See more »


Lieutenant Worf: Now we are ready.
Captain Jean-Luc Picard: The question is... for what?
See more »


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

Where's Guinan when you need her?
25 February 2016 | by skiopSee all my reviews

The Enterprise is struck by some force which causes everyone to forget their identities but not their skills. The information they can retrieve suggests that the Federation is in a long-term war.

With Guinan's intuition (she's been familiar with alternate time lines at least twice thus far in the series), she might have been able to shed some light on what was going on, but I suppose in that case, there wouldn't have been much of an episode. Guinan is completely missing here and Data briefly serves as a bartender.

Still, it's one of the better episodes, a real mystery similar to "Clues" but much better than that episode.

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Release Date:

15 February 1992 (USA) See more »

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Paramount Television See more »
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Aspect Ratio:

1.33 : 1
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