Becks, I love your list. I love all the characters you chose.
But to add on to that question, April. That could've been interesting to see Bellamy take on that responsibility and get badly hurt. Like left by another clan fighter believing he was dead, only he wasn't. That could've changed some things in those ending episodes. Clarke and crew trying to save him all the while saving themselves.
Could you imagine a comatose Bellamy being in the bunker or lifted off into space?
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Love this!