While The Flash prepares to vanquish The Reverse-Flash, Leonard Snart, a.k.a. Captain Cold, comes looking for a fight, teamed with Mick Rory, a.k.a. Heat Wave.

During the holidays, The Flash confronts the Man in the Yellow Suit, a.k.a. The Reverse-Flash - the man who killed his mother. Caitlin gets surprising news about her fiancé.