Rumple’s wife was out of the picture before he became the dark one yet he’s meant to be trying to save her according to the synopsis of this episode. Where would he have found the time to go after Hook after he becam the dark one? Bae would have surely noticed his father’s absence and Rumple would have been busy creating the dark curse to get Bae back unless Rumple is in the process of getting what he needs for the curse when he comes across Hook.