Hot Crew! : Summer Glau
“Summer Lyn Glau (pronounced /ˈɡlaʊ/; born July 24, 1981) is an American actress and dancer, known for playing River Tam in the science fiction series Firefly and follow-up movie Serenity, and for playing Cameron in the series Terminator: The Sarah Connor Chronicles.” — Wikipedia
“Let’s face it: A young, attractive girl kicking ass and taking names is always a good thing,” – TVTropes.com
Anyway you slice it, she’s hot!