Don’t say you haven’t been warned: the trailer for The Flash season three’s fourth episode is full of spoilers: it reveals who came back in episode three and how one of them is a little different; it also reveals a new villain; plus the synopsis details a returning villain. So proceed at your own peril/lack of self control.
So now we get to see Jesse Quick in her new speedster costume (albeit very briefly) and a taste of the Mirror Master in action. According to the synopsis: “Barry (Grant Gustin) continues to train Jesse (guest star Violett Beane) and when a new meta human, Mirror Master (guest star Grey Damon), appears on the scene he lets her tag along. Mirror Master has teamed up with his old partner, Top (guest star Ashley Rickards), and is looking for Snart (Wentworth Miller) to even a score. Jesse is quick to join the chase but defies one of Barry’s orders which results in disastrous consequences.”