This scene is chilling just to see a still image from. It's a shot of Arthur and Dexter from the season four finale.
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This is when Michael C. Hall is at his best. He can go from innocent to absolute killer in a microsecond.
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Yes, that's Arthur Mitchell, talking to Angel in the offices of the Miami Police Department.
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Though they each have different reasons for doing so, Angel, Dexter and Laguerta are inching closer to nabbing Trinity during the episode "Hello, Dexter Morgan."
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As usual, Dexter has a great deal on his plate. He's seen here on the episode "Hello, Dexter Morgan."
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They often appear to be at odds, but Quinn and Deb actually make for great partners.
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Sometimes, it's best to listen to your father. Dexter should have killed Arthur Mitchell soon after he met him.
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Trinity comforts his daughter in this scene from Dexter, soon after he learns that she knows exactly who he is.
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Dexter Quotes

Deb: (excitedly) A baby? a motherfucking rolly-poly, chubby cheeked shit machine? Are you kidding me?
Dexter: I've never heard it described in quite those words before, but yeah.

Don't be sorry your darkness is gone. I'll carry if for you - always. I'll keep it with mine,

Dexter [to Lumen]