Things are about to take an especially dark turn for Rick on The Walking Dead Season 4 episode "Us."
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When Rick can't take down the zombie, Carl does it with a shot. What are the odds Bieber would remain calm without his entourage?
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Carl doesn't need a slick ride to get around. Bieber would have dropped miles back, since he wouldn't have his wicked wheels.
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When he and Rick discover Lil' Asskicker is missing, they mourn. That's more courageous than hiding pain and feelings like Bieber seems prone to doing.
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Carl can grow his own food to sustain life. Bieber would starve to death without his people to provide for him.
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Minutes after delivering his baby sister, and faced with two options: Mom as a zombie or putting a bullet in her head, Carl chose the latter. WWBD (What would Bieber do)? Faint.
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Rick has seen better days on The Walking Dead. This is a photo from "After."
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It's safe to say Rick has seen better days. This is a photo from The Walking Dead Season 4.
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The Walking Dead Quotes

How many walkers have you killed? How many people have you killed? Why?

Rick

You walk outside, you risk your life. You take a drink of water, you risk your life. Nowadays you breath and you risk your life. You don’t have a choice. The only thing you can choose is what you’re risking it for.

Hershel