Recent "The Flash" episode guide videos mostly featured Dr. Harrison Wells (Tom Cavanagh) revealing to his colleagues who he really is.
If you have seen the very last episode, Wells is actually the Reverse Flash that Barry Allen (Grant Gustin) battled in the ninth episode titled "The Man in Yellow Suit." That is the same man the Scarlet Speedster saw on the night his mother was murdered.
While Harrison Wells remains as the main nemesis of Barry, the STAR Labs team will continue to meet several meta humans. When the CW show returns on March 17, exactly after one month of hiatus, Barry and his friends will meet a familiar villain.
The 15th episode, titled "Out of Time" will not only feature a familiar character but a director well known in the fantasy realm. Thor Freudenthal, who directed "Percy Jackson: Sea of Monsters" called the shots for the next episode.
The official "The Flash" episode guide-synopsis reads below:
"Mark Mardon aka The Weather Wizard (guest star Liam McIntyre) appears in Central City intent on avenging his brother Clyde's death, and sets his sights on Joe (Jesse L. Martin), who shot Clyde. When Mardon attacks Joe and Barry (Grant Gustin), Barry is able to super-speed them to safety but Mardon gets away. Barry warns Joe not to go after a meta-human alone but Joe doesn't listen and ends up in grave danger."
This "The Flash" episode guide also talks about Wells being getting discovered by Cisco.
"Meanwhile, Cisco (Carlos Valdes) looks into the night the team captured the Reverse Flash and realizes something doesn't add up and begins to wonder whether Joe was right about Dr. Wells (Tom Cavanagh). Barry and Linda (guest star Malese Jow) end up on an awkward double date with Eddie (Rick Cosnett) and Iris (Candice Patton). Thor Freudenthal directed the episode written by Todd Helbing & Aaron Helbing (#115)."
"The Flash" episode 15 "Out of Time" trailer