The Flash Season 2 Episode 9 Sneak Preview: Running To Stand Still

Iris' brother Wally West arrives in Central City! The CW Television Network has released a sneak preview for next Tuesday's thrilling midseason finale of The Flash: "Running to Stand Still."

MARK HAMILL, WENTWORTH MILLER AND LIAM MCINTYRE RETURN; KEIYNAN LONSDALE JOINS THE CAST AS WALLY WEST — When Mark Mardon AKA The Weather Wizard (guest star Liam McIntyre) returns to break Leonard Snart AKA Captain Cold (guest star Wentworth Miller) and James Jesse AKA The Trickster (guest star Mark Hamill) out of Iron Heights, Barry (Grant Gustin) must stop these rogues from taking over Central City during Christmas. Meanwhile, Joe (Jesse L. Martin) and Iris (Candice Patton) meet Wally West (Keiynan Lonsdale).

Check out the trailer in the video below.

Kevin Tancharoen directed the episode written by Andrew Kreisberg.

"Running to Stand Still" episode of The Flash will air Tuesday, December 8 at 8PM on The CW.