Summer Glau on The Big Bang Theory

In this clip from tonight's episode of The Big Bang Theory, Sheldon, Leonard, Wolowitz and Raj see Summer Glau board their train and they discuss reasons why she could be on board.
Added:

The Big Bang Theory Season 2 Episode 17 Quotes

Wolowitz: Unlike you, I can actually talk to women while I'm sober.
Raj: You fail to take into account that even mute, I am foreign and exotic, while you on the other hand, are frail and pasty.
Wolowitz: Well ... you know the old saying: "Pasty and frail, never fail"

I have eleven hours with her in a confined space. Unless she's willing to jump off a moving train and tuck and roll down the side of a hill, she will eventually succumb to the acquired taste that is Howard Wolowitz

Wolowitz [about Summer Glau]