Here's what to expect from midseason finale

Following the airing of its episode titled "Heads Up"AMC has released a preview for its upcoming episode and midseason finale titled

In the upcoming episode;  "After having a few moments of peace, trouble finds its way to Alexandria yet again. Only this time, the threat might be too big to defeat."

In last Sunday's episode, the fate of Glenn Rhee, who was undefined, was finally revealed.

The episode revealed that the walkers ate up Nicholas’ intestines, and Glenn pulled himself under the dumpster to stay alive, while Enid appeared, saving and providing him with water.

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The second half of the sixth season will begin on Sunday, February 14, 2016.

Watch preview;