As shown at the end of this seasons mid-season finale, it seems that Harrison Wells is a no-good sort regardless of what world hes from. Earth-1s Wells was killed by Eobard Thawne, who then proceeded to assume his identity and torment Barry Allen as the Reverse-Flash. Earth-2s Wells seemed to be a decent guy, though. Creepy, sure, but he was helping to fight the good fight against Zoom well, until the mid-season finale saw him agree to work alongside Zoom to steal Barrys speed. And now, here in Potential Energy, we get to see him talk about his dark instinct. Just the tone of his voice when discussing this was eerie and chilling enough, but we were then given the shocking surprise of seeing Wells forcefully extracting samples from the holed-up Turtle.