10 Deadliest Accidents In Star Trek

3. Full Moon! Half Moon! Total Collapse!

"Klingons never do anything small, do you?" as Commander Riker said to Lieutenant Commander Worf. A gorch is one thing, a moon is another, though the principle remains the same. Praxis wasn't just any accident, it was a Klingon accident. When it erupted, the whole galaxy felt its force.

There might be argument to say that this wasn't an accident at all. Over-mining and lax safety procedures aren't the fault of happenstance. There was seemingly no malice in it, however, so we'll stick with our original ruling — a Klingon cock-up on an industrial scale.

There might also be argument to say this wasn't very deadly. The death toll for Praxis was never given on screen. One line from the fifth draft of the script for Star Trek VI: The Undiscovered Country, cut from the film, noted that the moon was "barren of indigenous life forms".

The only source that does provide a definitive figure for the population of Praxis — at half a million — is for an alternate universe in 'The Chimes at Midnight' short story, part of the Star Trek Universes Echoes and Refractions anthology. Either way, and automation aside, it would be more than odd if absolutely no one was around for the mining operations.

Moreover, if the shockwave from the explosion could play merry hell with the Excelsior on the other side of the Neutral Zone, how on Qo'noS was there still a Qo'noS right next door? As strange as it sounds, the Klingons got mighty lucky with "deadly pollution of their ozone," instead of immediate planetary obliteration.