'The Walking Dead': Lori Is Dead; T-Dog Dies Too (VIDEO)

This week's installment of "The Walking Dead" shocked fans by killing off not one, but two main characters.

SPOILER ALERT: If you have not seen Season 3, Episode 4 of AMC's "The Walking Dead," titled "Killer Within," proceed with caution.

First, T-Dog was bitten whilst cut off from the group, sacrificing himself to the walkers so that Carol could escape.

But the episode's most painful scene came after Lori went into labor, when the heroic mom decided to have a C-section to save the baby, despite knowing that it would kill her.

After Maggie safely delivered Carl's new sibling, and Lori tearfully said goodbye to her son, Carl had to shoot his mom in the head to stop her from turning into a walker. We think we may be traumatized for life.

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

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What did you think of T-Dog and Lori's deaths? Do you think the show is getting too dark, or are you digging the high stakes? Weigh in below!