Tonight’s episode of The Flash (The CW, 8/7C) finds Barry Allen confronting the man who killed his mother. That’s right, the creators of the series are springing this gut-wrenching moment on The Flash’s fall finale in The Man In The Yellow Suit. and this is the Christmas ep, folks!

For a peek behind the scenes of this extra-length episode (two minutes – set your DVRs!), follow the jump.