The Flash Season 3 Episode 3 Synopsis Reveals a New Villain & Hero

The CW has released the official synopsis for "Magenta," the third episode of The Flash's forthcoming third season.

The episode, which features the return of Tom Cavanagh as Harrison Wells (of Earth-2) and Violett Beane as his daughter Jesse, sees the team face off against the titular supervillain, played by Wish I Was Here's Joey King.

But what brought them back to Earth-1 to begin with?

You can check it out below.

The season starts in the alternate timeline of "Flashpoint," a world where Barry Allen's decision to save his mother from being murdered created a whole new reality where he grew up happily with his parents but had basically no relationship with Joe and Iris West.

EARTH-2 WELLS AND JESSE RETURN TO CENTRAL CITY — Barry (Grant Gustin) and Team Flash are thrilled to reunite with Earth-2 Wells (Tom Cavanagh) and Jesse (guest star Violett Beane). Wells confides to Barry and Caitlin (Danielle Panabaker) 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, (guest star Joey King) a new meta who can control metal, terrorizes the city.

The Flash's visual effects maven Armen V. Kevorkian directed the episode, which was written by Judalina Neira & David Kob. It will air on October 18.

Supergirl airs on Mondays at 8 p.m.; The Flash on Tuesdays at the same time, Arrow on Wednesdays, and DC's Legends of Tomorrow on Thursdays. The Flash will debut its new episodes on The CW starting October 4; Arrow, October 5; Supergirl, October 10; and DC's Legends of Tomorrow October 13.