CW’s “The Flash” will finally be introducing the supervillain fans have been waiting for since the series premiered.

On Dec. 9, viewers can tune into the CW to check out the first look at the Reverse Flash. How Reverse Flash will affect The Flash’s life and what the supervillain’s real name is remains a mystery, but check out the official synopsis below for a sneak peak at the upcoming episode, according to ComicBook.com.

“The Man in the Yellow Suit” — (8:00-9:01:30 p.m. ET) (TV-14, V) (HDTV)

“Barry (Grant Gustin) finds himself face-to-face with his nemesis, the man in the yellow suit, a.k.a. Reverse Flash, who killed his mother. Barry is frustrated when the Reverse Flash escapes, but Dr. Wells (Tom Cavanagh) and Cisco (Carlos Valdes) come up with a plan to trap him. All they need is bait, so they turn to Dr. Tina McGee (guest star Amanda Pays) from Mercury Labs to help.

“Meanwhile, it’s Christmas at The West household and Iris (Candice Patton) is in full holiday cheer. Eddie (Rick Cosnett) gives her a surprising gift but also leaves her with a question that could change her life. Joe (Jesse L. Martin) joins the search for the man in yellow and ends up in the crossfire. Caitlin (Danielle Panabaker) finds Ronnie (Robbie Amell). Ralph Hemecker directed the episode written by Todd Helbing & Aaron Helbing (#109).”

What are your theories about Reverse Flash and how do you think Barry’s confrontation with him will go? Chime in with your thoughts in the comments section below.