Andy's apparent cheerfulness.

He was never this happy when Kate was around -- rather grumpy and never failed to blame her for his failings. I can't shake the feeling that this is all an act whereby he's hoping she's watching the show, seeing that he's a changed man, and she comes back to him.

Kate? Words to live by: "Fool me once, shame on you. Fool me twice, shame on me!"

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You have meddled with the primal forces of nature, and YOU ... WILL ... ATONE!