As you may have surmised from the past 20 episode reviews, Star Trek: The Next Generation did not get off to a promising start. The scripts were, in the main, absolutely dreadful. The cast was also relatively large - nine regular actors, all of whom were jostling for screen time and character development. Some actors won out and got quite a bit of attention: Patrick Stewart, understandably, and also Brent Spiner and to an extent Wil Wheaton. One actor who seemed to lose out in particular was Denise Crosby, whose Lieutenant Tasha Yar hadn't received any real opportunities to be showcased. She was having a miserable time, the scripts were dreadful, and there was a general feeling in the air that the series was going to be cancelled before long anyway. So Crosby went to the producers and requested that they release her from her contract.
"Skin of Evil" is, therefore, Tasha's last great hurrah. Does the production team give her a proper send-off? Of course not. This is Season 1, and if there's an opportunity for the team to miss an opportunity, they're going to take it without hesitation. In this episode Tasha Yar is unexpectedly killed by an alien menace about ten minutes in, and the episodes focuses instead on Deanna Troi and Captain Picard.