After being released earlier in the story by Arya, Rorge and Biter attack Brienne and Pod at an inn. Biter gets the upper hand and proceeds to eat Brienne's face. Seriously. He fucking eats it:
Biter's mouth tore free, full of blood and flesh. He spat, grinned, and sank his pointed teeth into her flesh again. This time he chewed and swallowed. He is eating me, she realized, but she had no strength left to fight him any longer.
Brienne is saved by Gendry (who is still running around the Riverlands at this point in the novels), but she's left with half a chewed-up hamburger face, not unlike Josh Brolin in Jonah Hex. We assume TV Brienne is still running around with 100 percent of a complexion for the same make-up reasons TV Tyrion isn't currently waltzing around with a big, golden Humpty-Hump nose.