Life and death
Some times it seems that Dr Crusher's sick-bay has seen people virtually raised from the dead. For example in Code of Honour when Tasha was forced to "kill" her opponent in a fight deemed necessary by the custom of the ship's hosts. As planned by the Enterprise, after the successful hit with the poisoned glove, both competitors are beamed directly to sick-bay where Beverly is ready and waiting with the antidote.
In The Neutral Zone Dr Crusher really does waken the dead when three cryogenicly preserved people with diseases uncurable at the time of their death are found floating in outer space three or four centuries later.
According to all the clinical signs, Worf lies dead on the operating table as a result of failed surgery in Ethics but his Klingon back-up system soon "powers up" to the relief of everyone.
Of course Dr Crusher cannot work miracles. She can only watch in despair in Too Short a Season when the dangerous youth-returning drug takes its terminal effect on the double-dosing Admiral Jameson, who had been suffering from Iverson's disease in old age. Oh well, at least Dr Toby Russell would have approved.
There is nothing Dr Crusher can do to save engineer Malencon in Home Soil after he has been attacked by a rampant laser drill with a mind of its own. Likewise, the badly injured Klingon rescued by the away team in Heart of Glory later dies aboard the Enterprise in her sick-bay.
Of course the most heartless of deaths belongs to Tasha in Skin of Evil. Not quite a miracle, but you can see Tasha sneaking in a wild goodbye wave at the back of the cargo bay in her last TNG scene as Beverly and Jean-Luc enter the turbo lift after the four guests with drugs are beamed down in the previous episode, Symbiosis, which was filmed after her black stage death. Tasha gets a better send off in Yesterday's Enterprise and a reprise in All Good Things, not to mention recasting in Redemption and Unification. A bit like Beverly reappearing for the third season, I suppose.
When forced to, the doctor will even kill to defend herself. Beverly reported to Jean-Luc that phasers have to be set to kill in Conspiracy when she finds that the stun setting isn't up to the job when she fires on the possessed admiral Quinn. Beverly has to kill Jo'Bril in Suspicions. In Sub Rosa we first see just a highly-charged physical challenge to the intrusion into her house, but later she terminates Ronin.
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