The Flash showrunners and cast members kept warning us that things were more complicated than simply saying "Harrison Wells is the Reverse Flash," and we totally should have listened to them.
Warning: major spoilers below! If you haven't watched this week's episode of The Flash, "Tricksters," avert your eyes now!
So...Harrison Wells (Tom Cavanagh) is not the Reverse Flash after all! Although the man that looks like Harrison Wells has been speeding around town in a yellow suit, he's actually not the real Harrison Wells. It's actually Eobard Thawne (played by expert villain portrayer Matt Letscher), a completely different and separate person altogether, who sucked Wells' life out with some future tech after the car crash that killed Wells' wife, and genetically cloned Wells' DNA to make himself look like the scientist in the past, stealing his looks and his entire life for the past 15 years.