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:
Ken Thorley ...
Lt. Shipley (as Scott T. Trost)
Angelo McCabe ...
John Nelson ...


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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Release Date:

17 October 1992 (USA)  »

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Aspect Ratio:

1.33 : 1
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Did You Know?


The clock on Cmdr. Riker's wall gives the stardate as 46154.4 and the time as 10:37:41. The ".4" at the end of the stardate, is a decimal (base 10) reflection of how far through the current day it is, with each 0.1 representing one tenth of the day (2 hours and 24 minutes). Without the actual time given, the stardate alone narrows the time to between 09:36 to 11:59. See more »


Georgi puts the sensor relay emitter on the inside of Riker's arm at the crook of the elbow. When seen again in Riker's quarters, it is still on the inside of his arm, but closer to his wrist. After Riker is taken to the alien vessel. the emitter is on the outside of his forearm. 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 Main Title
Composed by Jerry Goldsmith and Alexander Courage
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User Reviews

A Creepy Mystery for the Enterprise Crew
29 March 2015 | by (South Dakota, United States) – See all my reviews

"Schisms" was an entertaining and rather creepy episode for "Star Trek: the Next Generation." The mystery of what was happening to Riker was intriguing; and, the gathering of the puzzle pieces by the members of the crew led to some chilling revelations. It has often been said that the most frightening enemies are the ones you cannot see; and, the ones in this story were certainly more than enough to make a viewer's skin crawl.

Members of the Enterprise crew were able to solve the mystery of what was going on without figuring out why it was happening. For some viewers, this may be perceived as a shortcoming of the story. For others, it might be perceived as meaning that some mysteries will always remain beyond the boundaries of the knowledge of man, even in the 24th century.

The classic episode, "Relics," was broadcast only a week earlier; so, "Schisms" had to live up to unusually high expectations from viewers. However, the episode still managed to stand on its own, providing viewers with a very disturbing story. Furthermore, the scene in which Data performed his poetry reading is probably one of the more memorable moments in the entire series. Overall, the episode is well worth viewing.

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