He'd Kill For Her
In The Mentalist Season 1 Episode 23, "Red John's Footsteps" after declaring that he'd willingly die if it meant capturing Red John, Jane ends up shooting and killing the one man he knows could lead him to the serial killer in order to save Lisbon's life. Even Jane looks completely shocked by his actions.
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I was among the swooners and so happy.

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The Mentalist Quotes

Belinda Bittaker: You can sneer at me all you'd like.
Patrick Jane: I will, thank you.

Jane: The point is there's a coded message here.
Cho: Or doodles.