Did Abby become another casualty of war?
That was revealed on The 100 Season 5 Episode 11 when it became apparent that the end of the line was near if she did not get the treatment she needed.
With that, Clarke made it her mission to learn everything about what happened in the Bunker during the five years.
That meant she was told the story of "The Dark Year," and she had to choose whether anyone from inside was trustworthy again.
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Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.