an early Season 1 episode (it may even be the pilot), Claire asks Kate if she's a Gemini, and Kate responds with a yes. Is this a subtle clue that Kate either (a) has a twin or (b) is a double agent for the "others"? Young age and sent to the island with Dharma?

There are more than a few posted theories on Dharma's experiments involving twins or clones for research purposes, the beginning of a new utopian society, etc. I thought I remember a few posts about some of the characters possibly having twins (Jack?). Such theories suggest that Kate has been on the Island before. But instead, could Kate have a twin living on the island? And with the interest in taking "special" children (i.e. Alex was taken from Danielle, a pregnant Claire was abducted, Walt was kidnapped), could this twin have been there from an early age? Is there a "good" Kate and a "bad" Kate ("Bad Twin")?

I thought of this after re-watching Season 1 and then watching Kate's dad in Wednesday's episode ("One of Them"). He was awfully sad when looking at the picture of a young Kate. Could that photo have been of her twin, who was separated from them at a yuth?

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