Next week on The Walking Dead we’ll head back over to the prison to follow Rick and his group as they continue to settle in. It looks like they run into some unexpected trouble in this Walking Dead sneak peek.

The first Walking Dead sneak peek for next week’s episode, “Killer Within,” featured some lighthearted teasing of Glenn and Maggie, but in this new scene, spirits aren’t so cheerful. Someone has sounded the prison’s alarm, and that causes all kinds of trouble.

Rick, Daryl, and Glenn are frantically running about as we see walkers closing in on the prison gates. A noise that loud is bound to cause a herd to rush the prison, bringing walkers in from all over the surrounding area.

Walkers might not be the only problem. If there are any people out there nearby, they might also hear the aggressively loud alarm.

Could people from Woodbury be close enough to hear the noise? We’re not as scared of the walkers rushing the prison as we are of the Governor potentially discovering Rick’s gang at the prison.

The promo for next week’s episode of The Walking Dead also shows Rick convinced that someone is messing with them, and sounding this alarm could be a part of that.

Could one of the prisoners be behind this? Or could there be someone else in the prison Rick has yet to find?

Hopefully they got it silenced before it drew too much attention to them.