Why? Just because he's your great, great, great grandson, or whatever?! How is that on you? [ Cisco keeps smoothing his hand over Eddie's back as he speaks. ] I get it. In whatever distant way, he's family, and family stuff's complicated. But Eddie... don't you get it that saying it's your fault makes no sense. You didn't raise him. You didn't raise whoever raised him. It's so far removed... I don't even know who my great great great grandfather was. But I do know that, whoever he was, he certainly wasn't responsible for making me a good person, or a bad person, or an engineer, or whatever.

[ Cisco knows that Eddie's feeling of guilt isn't coming from a place of logic, that logical arguments probably aren't the way to alleviate it. But the idea that Eddie is responsible for Eobard is abhorrent to him - moreso than he would have anticipated. He takes a moment to sift through his thoughts, to understand why that line of reasoning upsets him. Once he realizes, he speaks again, quietly but firmly. ]

Look, I know- I know how easy it is, to see everything as your own personal fuck-up. But don't you see... trying to assign blame to other people for the things he did, that's a slippery slope. Is Barry responsible for Eobard, because he was the one he came back to kill? Is the real Harrison Wells, for providing him an identity he could use that people would trust? Am I responsible for him, for not saying the right thing at the right moment to make him change his ways?