(I think it'd be particularly cool with Zelenka, but any character that isn't Carter or part of Sheppard's team would do. )
Explore a minor character going though the events of Tabula Rasa - bonus points if you can do it without writing it entirely in first person POV.
The entire base is exposed to an ancient device that turns everybody homosexual. It didn't effect John and Rodney who are already homosexual together, or Carson who is also gay. When they fix it, Lorne goes to Beckett saying that the anti-gay-ray didnt work on him and he's still gay. Carson proves to him that he's gay for real.
A night to remember... Zelenka, Sheppard, Ronon, Lorne and McKay sitting on dock 3, eating evil!jello [jello made with vodka instead of water + fruits] - getting drunk and having 'important' talks :) No smut, no sex, no pairings, just fun?