'The Walking Dead' Premiere: A New Threat Revealed Inside The Prison (VIDEO)

On the season premiere of “The Walking Dead,” the prison gang and the Woodbury survivors joined together, which meant the introduction of some new people. One of those newbies was Patrick ... a kid we’ll never really get to know. Warning, spoilers ahead.

Patrick seemed all well and good until the end of the episode. During story time, which was really Carol teaching kids how to protect themselves, Patrick excused himself and said he felt sick. A trail of blood followed the young boy as he made his way to the showers, where he collapsed ... until his eyes popped open, and he rose as a walker.

Could it be that he was just sick and nobody knew? How is this tied to the death of the pig? Is the virus that has infected them all (which was dormant until death) started to kill them?

"Well, it’s definitely some kind of nasty illness. Something that can make a guy go from cough-cough-I’m-not-feeling-well-can-I-go-lay-down? to essentially bleeding out in the shower after a few hours is something on the swine flu level — possibly a little bit more deadly," executive producer and comic creator Robert Kirkman told EW.

Regardless, now there's a zombie in the prison.

"The Walking Dead" airs Sunday nights at 9 p.m. ET on AMC.

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