Once learned of the identity of ZOOM- Jay Garrick, Barry Allen is more determine than ever to look for an alternative other than Velocity 9 to increase his speed. The one ‘brilliant’ idea he came up with is travel back in an earlier time to somehow extract the answer from Harrison Wells/Eobard Thawne before he turn evil on Team Flash. Wells of Earth-2 warned Barry if Wells of Earth-1 already spend 15 years working on that formula, how is he not going to recognize who Barry Allen is? After all it was he who caused the particle accelerator explosion that created The Flash. Barry Allen was essentially Eobard Thawne lab rat. But Barry Allen is determined as we see from the clip below, the result of his head strong personality. More likely, Wells of Earth-2, Cisco and Caitlin will come up with an idea to extract him from the sticky situation he got himself in once again. Two familiar characters resurface in this episode. Eddie Thawne (Rick Cosnett) , ex partner of Joe Wells at CCPD and fiancée of Iris Wells. This should pour cold water into the budding relationship between Iris Wells and her new boss/editor. And Pied Piper/Hartley Rathaway (Andy Mienthus) a meta-human semi-villain probably comes into play to save Barry Allen from Eobard Thawne. He and Cisco had this friend/foe relationship on the previous encounter. Check out the preview and the inside look on tonight’s Flash Back episode below.