Commander Riker's inability to fall asleep begins to show in other members of the crew in other forms, putting the Enterprise on the trail of a mystery.



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Episode cast overview:
... Capt. Jean-Luc Picard
... Cmdr. William Riker
... Lt. Cmdr. Geordi La Forge
... Lieutenant Worf
... Dr. Beverly Crusher
... Counselor Deanna Troi
... Lt. Commander Data
... Ensign Sariel Rager
Ken Thorley ... Mr. Mott
... Kaminer
Scott Trost ... Lt. Shipley (as Scott T. Trost)
Angelo McCabe ... Crewman
John Nelson ... Medical Technician
... Enterprise Computer (voice)


Commander Riker has not been sleeping well but Dr. Crusher can't find anything wrong with him. He is constantly exhausted and has images of object in his mind that he can't quite place. He is not the only one with a sense of deja vu and with others, manages to piece together what has been happening. It would seem they are being taken from the ship during their sleeping hours by a race conducting experiments on them. Who they are and what they hope to achieve is unknown but everyone agrees it must be related to the inter-dimensional hole in space that is somehow being created in one of the cargo bays. Written by garykmcd

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Official Sites:

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Release Date:

17 October 1992 (USA)  »

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Technical Specs


Sound Mix:


Aspect Ratio:

1.33 : 1
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Did You Know?


The character of Kaminer was named after author Wendy Kaminer. See more »


Considering an emergency has been called in the cargo bay security and medical teams wernt exactly rushing to the scene. See more »


[last lines]
Captain Jean-Luc Picard: Have we any idea what came through the rupture before we were able to shut it down?
Lt. Cmdr. Data: No, sir. We were unable to track it once it left the cargo bay.
Lt. Commander Geordi La Forge: Maybe it was a probe of some kind.
Lt. Cmdr. Data: Possibly they were simply curious, explorers, like ourselves.
Commander William T. Riker: Ensign Rager and I were lucky to have escaped. Lieutenant Hagler is dead. Whoever it was that sent that thing was more than simply curious.
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Referenced in Star Trek: The Next Generation: A Fistful of Datas (1992) See more »


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

Why Do They Know So Little and Yet So Much
24 September 2014 | by See all my reviews

This isn't such a bad episode. As is so often the case, as the characters become more and more confused as to why these things are happening to them, they seem to come up with solutions, right out of the blue. This high tech solution-making is a critical part of many episodes. It always amazes me to find our guys Geordi and Data coming up with an endless stream of options to a problem they've never encountered. None of these make any sense to me. Do they to anyone? Is this real science or is it made to sound good. I know on doctor shows they do some of the same stuff, but their are medical experts who could, conceivably, tear things apart. Do people in the space sciences do the same thing. Members of the crew are becoming sleep deprived and don't know what is happening to them, just that they are a mess. Also, crew members have been leaving the ship without outside access or permission. Riker is a mess. They have to do something, and this is where all the talk comes in. Some kind of light source is in the dock area and is starting to compromise the ship. They must find a way to stop it. How do they do it? They just do.

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