Yes, but In the Name of the Brother, he says to Gerhart: I will save you, I will find a way.
This makes me believe that when he says he needs to bring him back, he means bring the real Gerhart back and not the monster he’s created. I think Gerhart is still chained up somewhere and Victor was pulled from his world before he had a chance to do anything about it.
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Keeper of Pandora's Box & The Yellow Brick Road.