Star Trek Fic Finder

Hi :) making my way through TOS and am really burning to know if anyone's found any good fiction about...

Episode Oriented:
1.) Post Plato's Stepchildren. Emotions being forced out of Spock really took their toll on him as could be seen in the scene immediately following. I'm looking for any fics that kind of explore how Spock feels about this or what it did to him... (possible pairings: K/S, Mc/S)

2.) Empath - really anything dealing with this episode would be great :)!

Other:
3.) Cold!Spock. I've read 1 or 2 but there's got to be more right :)? Since his Vulcan physiology makes him more susceptible to cold than humans, I reaally want to read fics where this becomes an issue. If that's too specific, any fics dealing with an environment hostile to Vulcans but fine for humans works too! I'd love some good mission/plot fics but I'll take simple slashy ones, h/c, or just about anything! K/S or Mc/S

4.) Any fics where McCoy and Spock join forces in mutual concern over Kirk. (like in "Obession" or "The Conscience of the King").

eta: I don't mind if they're written from a TOS or ST 2009 point of view, though obviously some will make more sense if written with TOS in mind.
Thank you <3