I cant have been the only one who initially thought that the girl who Sara first attacked in Haunted looked just a tad like Thea Queen, and this was no mere coincidence as we find out that Sara is targeting those who look like Thea. Of course, Thea would ignore Olivers call when he pieces this together, and as such she has an enraged Sara burst through her window and give her a major ass-kicking. This would all be revealed to be part of the blood lust after-effect of the Lazarus Pit, with Sara needing to kill the person who killed her.