The CW has released the trailer for the midseason finale of The Flash. The episode titled Running to Stand Still brings back The Weather Wizard, Captain Cold, and The Trickster. Watch the trailer below:

https://www.youtube.com/watch?v=gnNMtVztoBE

Read the synopsis for Running to Stand Still:

“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 must stop these rogues from taking over Central City during Christmas. Meanwhile, Joe and Iris meet Wally West (Keiynan Lonsdale).”

View some photos from the episode in the gallery below:

SOURCE