Mark Hamill, Wally West and More Appear in The Flash Midseason Finale Photos

12/02/2015 04:57 pm EST

The Force is strong with that teddy bear, apparently.

The CW has released the first official images from next week's midseason finale of The Flash, featuring the first on-screen appearance of Wally West.

Aside from Wally's first appearance and plenty of Christmas hijinks, the episode also guest-stars Mark Hamill as The Trickster, just weeks ahead of his turn as Luke Skywalker in Star Wars: The Force Awakens.

You can check them out below, along with the official synopsis for the episode.

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). Kevin Tancharoen directed the episode written by Andrew Kreisberg (#209). Original airdate 12/8/2015.

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