I was trying to find a comprehensive list of Warp Core Ejection events on the net and am coming up empty.

The best thing I found was:

a link at memory-alpha(.org) centered around Voyager mentioning no other such event during a TV series.

I am having trouble with this, emotionally speaking, as I feel part of my childhood memory may have been fabricated via ESP.

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    Usually the problems have been because they're unable to eject the core when it's about to breach/overload. Perhaps your memory just has it backwards? Do you have a specific scene in mind, that we may be able to pinpoint if you describe it?
    – Izkata
    Commented Oct 29, 2013 at 4:09
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    You got to marvel at Federation ingenuity with Voyager - they replaced their warp core 4 times when over 50 years travel to the nearest StarFleet spacedock
    – HorusKol
    Commented Oct 29, 2013 at 6:27
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    @HorusKol not really. Once the warp core is ejected it's a simple matter of a shuttlecraft or two and some tractor beams to tractor it back into position and reinsert it if there's no damage to the core which would preclude doing so.
    – Dr. JKL
    Commented Oct 29, 2013 at 21:24
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    @NOTjust--user4304 Scotty never doing it doesn't surprise me; the technology in TOS wasn't very well defined. And it would've been Geordi on TNG, if that helps your memory. O'Brien on DS9.
    – Izkata
    Commented Oct 29, 2013 at 21:33
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    @Dr.JKL - the warp core was ejected because it was about to explode... and did explode after the ejection - nothing to recover
    – HorusKol
    Commented Oct 29, 2013 at 21:53

1 Answer 1


There's a good list of Warp Core ejections on the Star Trek Wikia

There are seven specific instances of Federation warp cores being successfully ejected, twice in the Film canon and five times in Star Trek : Voyager.

  1. The Enterprise-E warp core was ejected to seal the subspace tear in "Star Trek : Insurrection".

  2. The Enterprise crew ejected several warp cores to create a shockwave they could use to escape the black hole that formed in the Narada in the 2009 movie "Star Trek"

  3. By Chakotay's spirit inhabiting Torres (in order to prevent Voyager from entering a nebula) in "Cathexis"

  4. To prevent a breach due to a build-up of tachyon particles in VOY "Day of Honor"

  5. By the Doctor (to barter for Janeway's release) in "Renaissance Man"

  6. The duplicate Voyager ejected their warp core to try to get the attention of the real Voyager crew in "Course: Oblivion".

  7. The 2nd Delta Flyer ejected its warp core in "Drive" because the fuel converter had been sabotaged.

Voyager Warp Core Ejection

For the record, although the ejection system is described in detail in the "TNG Technical Manual", the Next-Generation crew failed on at least 14 8 separate occasions to eject the core (including parallel universes).

Warp Core Ejection procedures

  • I know that with I have a crack of tear in something, I want to use high explosives to seal it too. Makes perfect sense.
    – John O
    Commented Dec 27, 2013 at 1:29
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    I rather think that it's analogous to using explosives to close a tunnel
    – Valorum
    Commented Dec 27, 2013 at 11:23
  • @Richard: Let's blow up all the nothing so it collapses around the void! Sadly, it makes 'sense' in the Star Trek way of thinking.
    – Jeff
    Commented Jan 29, 2014 at 13:27
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    Except that the existence of virtual particles and vacuum energy would suggest that the void is anything but empty
    – Valorum
    Commented Jan 29, 2014 at 14:40
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    Let's not get wrapped around the axle with our metaphors ;-) "Tear" is hardly a scientific description for a disruption of subspace, and "seal" is anything but a technical term for restoring equilibrium, so it's entirely possible that an anti-matter explosion will do what they want, even if it doesn't fit into the metaphor.
    – Matt
    Commented Jan 29, 2014 at 16:13

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