The Flash started strong to its 3rd season with the explanation of the Flashpoint and its aftermath with Barry Allen returning everything to almost normal. After that Dr. Alchemy, a villain who is restoring the powers of meta-humans in the Flashpoint timeline, emerged. These two weeks Magenta and Rival were the villains brought back to The Flash and seems like Alchemy will carry on with the mission.
It is reported that a villain known from the comic books as a part of Flash’s Rogues will be visiting the TV series. This villain is Mirror Master. This might not be the only character to show up though. Apparently, Captain Cold played by Wentworth Miller will also be in the next week’s episode.
The next week’s episode synopsis was released by The CW announcing Captain Cold’s return and Mirror Master’s appearance:
“WENTWORTH MILLER RETURNS AS CAPTAIN COLD; MIRROR MASTER AND THE TOP BATTLE WITH THE FLASH — 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. Stefan Pleszczynski directed the episode written by Benjamin Raab & Deric A. Hughes (#304).”
