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Cause And Effect 

The Enterprise gets caught in a time loop which always has one result: total destruction of the ship, itself.


Jonathan Frakes


Gene Roddenberry (created by), Brannon Braga




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
Michelle Forbes ... Ensign Ro Laren
Patti Yasutake ... Nurse Alyssa Ogawa
Kelsey Grammer ... Capt. Morgan Bateson


Unbeknownst to the crew, the Enterprise is caught in a time loop where they are continually reliving the same day. The Enterprise approaches a temporal distortion from which another Federation vessel is emerging. The evasive action action they take - using the tractor beam to push the oncoming vessel away from them - is unsuccessful and the Enterprise is destroyed, at which point the time loop brings them back to the beginning and they relive the sequence all over again. Several members of the crew however begin to have a serious case of déjà vu and become convinced that they are reliving the same day, over and over. Data has an idea that might get them out of it. Written by garykmcd

Plot Summary | Plot Synopsis


TV-PG | See all certifications »

Did You Know?


A number of new models were constructed for this episode. Four breakaway models of the Enterprise were created which could be blown apart with pyrotechnics to depict the multiple explosions of the ship. A large model of the starboard warp nacelle was also built, to depict the damage from the two ships colliding. And a model of the main shuttle bay was built to depict the bay door opening, which had never been seen from the exterior on camera before. See more »


On several occurrences within the loop, Data states "Core breach is eminent" when he should be stating that a core breach is "IMMINENT." See more »


[first lines]
Commander William T. Riker: Damage report!
Doctor Beverly Crusher: Casualty reports coming in from all over the ship!
Lt. Commander Data: The starboard nacelle has sustained a direct impact. We are venting drive plasma.
Lt. Commander Geordi La Forge: Initiating emergency core shutdown!
Ensign Ro Laren: Inertial dampers failing. We're losing attitude control.
Commander William T. Riker: This is the bridge. All hands to emergency escape pods!
Lt. Commander Data: Core shutdown was unsuccessful. We are losing antimatter containment.
Lt. Commander Geordi La Forge: We've got to eject the core!
Lt. Commander Data: Ejection systems offline. Core breach is imminent.
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Referenced in The X-Files: Monday (1999) See more »


Star Trek: The Next Generation Main Title
Composed by Jerry Goldsmith and Alexander Courage
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User Reviews

Star Trek meets Groundhog Day meets Edge of Tomorrow - Highly enjoyable!
3 April 2018 | by ddt_eagleeyeSee all my reviews

Damn. This Episode shows how much creativity and sophistication the writers put into the show and how much movies of today are inspired by it. The basic premise is that Enterprise is stuck in a destructive timeloop, where the crew begins to realize they're reliving the same chain of events time and again with every further iteration adding little bits and pieces of the incident residing in their memories. It is a classic story of "What happened if you would relive the same day every day?" like seen in Groundhog Day for example, but with its own genuine and fresh take on it. Highly enjoyable!

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Release Date:

21 March 1992 (USA) See more »

Company Credits

Production Co:

Paramount Television See more »
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Technical Specs


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Aspect Ratio:

1.33 : 1
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