So, I'm watching ST:TNG

[The Valkyrie]

The first major officer death: Lt. Tasha Yar

That episode ending definitely pulled on my heartstrings.

I didn't like how they reintroduced her some seasons later. The death of the character of Tasha had an air of finality to it, and that, IMO, was perverted with that alternate timeline jazz episode. This Lazarus plot device is bloody annoying to me.

I honestly thought that was a bad episode.

Nerd alert, Eleven. There's an episode before that one where you'll see Tasha in the background as the other characters walk away and she is seen to wave.

That episode was filmed after she was killed off (because she asked to be written out since she didn't like the way female characters were portrayed. The same reason Crusher wasn't in season two).