I think Nessa is right. It can’t be a flashback because the last time we saw Pre SB Emma with the pendant it was still a keychain. So unless the Flashback is Emma getting out of prison, it must be new. And it can’t be a flashback also because none of the episodes so far suggest an Emma flashback. 313= Regina; 314= Charming; 315 = Belle (Neal?); 316 = Wicked; 317 = Hook; 318 = Cora/Eva; 319 = Ozian flashback. We know they haven’t started 320. Emma was not wearing that in the shots for 315, 316, 317. We have almost no information about 318. Therefore, I deduce it’s 318
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"He was a lot of things to me" "The only conclusion was love"