The CW has released the official synopsis for "Flash of Two Worlds," the upcoming second episode of The Flash Season Two.

The episode is named after The Flash #123 -- the episode in which the DC multiverse and the concept of Earth-2 was introduced in the comics. Patty Spivot will make her first appearance as well.

You can check out the synopsis below.

“Flash of Two Worlds” — (8:00-9:00 p.m. ET) (TV-PG, LV) (HDTV)

INTRODUCING JAY GARRICK — Jay Garrick (guest star Teddy Sears), a mysterious man from Earth-2, appears at S.T.A.R. Labs with a dire warning about an evil speedster named Zoom, who is set on destroying The Flash. Barry (Grant Gustin) and the team must decide if they can trust this stranger even as they face yet another powerful meta-human. Meanwhile, Joe (Jesse L. Martin) must deal with a determined officer named Patty Spivot (guest star Shantal VanSanten) who wants to join his meta-human task force. Jesse Warn directed the episode written by Aaron Helbing & Todd Helbing (#202). Original airdate 10/13/2015.