However, I can't see it having been Kate Pulaski showing up, as written in the Ethics script, because Dr. Toby Russell, is far more unethical in her practice than Pulaski ever was. In fact, the only time I can ever recall Pulaski being remotely reckless was in Unnatural Selection... With her own safety, never a patient's.
This was my one problem with "Ethics". Initially Dr. Russell was characterized as being very aggressive, but most of what she said and did were within the bounds of reason. For instance, the treatment she proposed for Worf wasn't crazy. The fact that there was some logic to her position made her disagreements with Crusher a two-sided debate. And that made the story rewarding both intellectually and entertainment-wise.
But then Dr. Russell went several steps further and recklessly administered the experimental drug to the casualties they'd rescued. That act was past the bounds of reasonable behavior and made her a cartoon villain, rather than a credible challenge to Dr. Crusher's point of view.
Because of that, I like your suggestion of having Dr. Pulaski play the foil to Dr. Crusher in this episode. It would have made the debate more interesting because it would have been between two people with reasonable, but differing opinions, rather than between a clearcut good guy and a clearcut villain.
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