"Magenta" is the third episode of the third season of The Flash, and the forty-ninth episode overall. It aired on October 18, 2016.
Barry and Team Flash are thrilled to reunite with Earth-2Wells and Jesse. Wells confides to Barry and Caitlin that Jesse has all the powers of a speedster and has been saving people on his Earth. He is concerned about her safety and wants them to talk her out of using her powers. Meanwhile, Magenta, a new meta who can control metal, terrorizes the city.[src]
When Magenta tries to kill Julian, Barry saves him by grabbing him and pulling him out of the way. This is shown in slow motion and Julian is seen moving his feet and stepping along the floor with Barry. However, Julian is not a speedster so his brain would barely be able to register what was happening in that split second (because of how fast Barry runs), let alone him being able to know that he needs to move his feet. On top of that, there is no way Julian would be able to move his legs that fast.