'The Walking Dead' season 4 premiere "30 Days Without An Accident" set up a new world order for Rick Grimes and his fellow prison survivors, but how long until it all comes tumbling down? A new round of photos from this Sunday's follow-up, "Infected," have hit the web, and it looks at if we already have a few new targets to fall from a walker infestation at the prison.

Courtesy of TVLine and Entertainment Weekly, the latest batch of photos from "Infected" (the first of which you can see here) highlight the outbreak that [SPOILER ALERT] stems from Patrick ('Phineas & Ferb' star Vincent Martella) last week, as one by one, former Woodbury survivors fall victim to the close-quarters encounter. Tyreese's lady love Karen (Melissa Ponzio) seems prominent with her flashlight, so might we assume Tyreese's luck has already run out?

From AMC's official description of Sunday's "Infected":

The group faces a new enemy; Rick and the others fight to protect their hard-won livelihood.

Descriptive, no? In any case, it seems from the photos as if both Rick and Michonne will have a hard time getting back in time to fight off the new walkers, even with Michonne's new equine friend. And what of that mysterious saboteur we saw in an earlier clip, feeding rats to the walkers by the fences?

Check out the latest photos from Sunday's all-new 'Walking Dead' installment, and give us your predictions in the comments!

AMC / TVLine
AMC / TVLine