Plus there was this recent TV Line spoiler about Tamara having an agenda:
“Soon enough, you won’t be wondering who Tamara might be so much as wondering what the [bleep] her agenda is.”http://tvline.com/2013/03/14/ncis-castle-big-bang-theory-scandal-spoilers/
Plus, in the promo, it makes it seem like August and Tamara knew each other, when Tamara says, “Long time,” and August asks, “Are you trying to take the magic from SB?”.
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"That’s how you know you’ve really got a home. When you leave it, there’s this feeling that you can’t shake. You just miss it." Neal Cassidy