I rewatched this one last night.
As Gary Mitchell is changing, Dr. Dehner deliberately misreports, distorts and comes this close to outright lying to Kirk about what is happening to Mitchell.
KIRK: You mentioned that tests show you have a high degree of extrasensory perception. So do the records of the others. Gary Mitchell has the highest esper rating of all.
DEHNER: lf you’re suggesting there’s anything dangerous
SPOCK: Before the Valiant was destroyed, its captain was frantically searching for ESP information on his crew.
DEHNER: Espers are simply people with flashes of insight.
SPOCK: Are there not also those who seem to see through solid objects, cause fires to start spontaneously?
DEHNER: There’s nothing about it that could possibly make a person dangerous.
This is from before any serious affects had been seen. Why is she so sure there is nothing dangerous? Do you think there have been proper ESP studies in the 23rd century? It is likely however that she’s never heard of the events of Talos IV.
Later, after Mitchell has blanked the sickbay panel, and read Kelso’s mind.
SPOCK: Have you noted evidence of unusual powers?
DEHNER: He can control certain autonomic reflexes. He reads very fast, retains more than most of us might consider usual.
“Control certain autonomic reflexes”! That’s a serious understatement! She makes it sound like he can lower his heartrate like some sideshow performer.
Why is she hiding what Mitchell can do from the staff? She’s withholding (what turns out to be) critical information. Does she think the senior staff is going to storm sickbay with torches and pitchforks to rid themselves of the witch?
Finally:
KIRK: Are they right, Doctor? Has he shown abilities of such magnitude?
DEHNER: I saw some such indications.
KIRK: And you didn’t think it worth mentioning?
DEHNER: No one’s been hurt, have they? Don’t you understand? A mutated superior man could also be a wonderful thing. The forerunner of a new and better kind of human being.
Is she some fuzzy headed ivory tower academic that really can’t see the risks? That she thinks her judgement is more valuable that the captain’s?
By this time, maybe she’s started noticing she’s changing, too, and her lies of omission are just self-preservation.
Whatever the reason, she’s still wrong. Even before that, she completely missed the (as it turned out) actual threat Mitchell (and ultimately, her) presented to the crew, and humanity. Of all crew, it’s her job to see that risk.
KIRK: You were a psychiatrist once. You know the ugly, savage things we all keep buried, that none of us dare expose. But he’ll dare. Who’s to stop him? He doesn’t need to care.
Why does Kirk have to be the one to point that out? I can’t help but think how it would have turned out if Troi were there instead of Dehner.
Even so, is she one of those people Kirk mentioned in the forward to the ST:TMP novelization? The really smart ones that get seduced by the superior things in the universe and forget their training and their obligations and their code?