PS I'm still curious as to the answer to Satyrquaze's question.
Sorry, Mr_Homn correctly pointed out that Denise Crosby was listed in the opening credits throughout the remainder of the season. I didn't bother looking it up and just assumed that she was wasn't listed after "Skin of Evil".
nope she's in the entire season's intro credits even after she dies
So, I guess I should just defer my next correct answer to him.