I'm a little surprised no one has mentioned this one.
Uhura screaming when Hanoch in Spock's body is making an example of her.
This next one isn't dark in the sense the OP meant but dark in the sense of something unseen and unknown and it's a moment I never forgot when I saw the original broadcast of "All Our Yesterdays".
When the hooded figure suddenly appeared when Spock and McCoy were stranded in the frozen wilderness, I was totally riveted by the mystery of what it could be and I found it almost ominous and menacing. And then I was very surprised when it turned out to be a scantily clad woman. That's Hollywood for ya!
Robert
	
		
			
		
		
	
				
			Uhura screaming when Hanoch in Spock's body is making an example of her.
This next one isn't dark in the sense the OP meant but dark in the sense of something unseen and unknown and it's a moment I never forgot when I saw the original broadcast of "All Our Yesterdays".
When the hooded figure suddenly appeared when Spock and McCoy were stranded in the frozen wilderness, I was totally riveted by the mystery of what it could be and I found it almost ominous and menacing. And then I was very surprised when it turned out to be a scantily clad woman. That's Hollywood for ya!
Robert
				
 No offense.
		
 Still absolutely no idea what you're talking about, so I'm just going to say, "No, whatever you're referencing has nothing to do with my story" and move on with my life. Have a great day!