Gateworld have held an interview with Tori Higginson. Just follow the
link. Beware of spoilers though for Season 2.

*EXCERPT*


GW: What episodes do you think were the most significant for your
character?


An aged Dr. Weir turns up in stasis in an Atlantis lab in "Before I
Sleep."
TH: For my character? I think "Letters From Pegasus" was really nice
for her. You got to see the thing that you've not been able to see --
her humanity. And that is the reason she is where she is and yet,
ironically, that's the thing she has to reel in, reign in. So that
was the one episode you could see her caring about the people. And
actually that's where her heart is and that's what is most important
to her. So that one I love.


http://www.gateworld.net/articles/interviews/higginson02.shtml