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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Technical Specs


Sound Mix:


Aspect Ratio:

1.33 : 1
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Did You Know?


Ensign Rager gets a first name in this. Sariel. See more »


With 5047 specifications of table in the database, the computer knows exactly what type of table to create in the holodeck based on very little information given by those taken by the aliens. See more »


Lt. Cmdr. Data: [reciting "Ode to Spot"] Felis catus is your taxonomic nomenclature - An endothermic quadruped, carnivorous by nature. Your visual, olfactory and auditory senses - Contribute to your hunting skills, and natural defenses. I find myself intrigued by your subvocal oscillations, A singular development of cat communications - That obviates your basic hedonistic predilection - For a rhythmic stroking of your fur, to demonstrate affection. A tail is quite essential, for your acrobatic talents; You ...
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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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