The Flash - I Know Who You Are

In an episode primarily focused on Team Flash trying to keep Killer Frost (Danielle Panabaker) from killing the scientist (Anne Dudek) who will one day create a way to trap Savitar in the Speed Force, "I Know Who Are" also delivers the long-awaited reveal of the identity of the season's big bad. It's somewhat less impressive than intended. Over the months since the character's initial appearance there have been many theories about just who is under that armor and what his true motivations are. I never liked the theory of Savitar being an older version of Barry (Grant Gustin) where other more interesting options were available. However, that seems what we're stuck with. Of course by with the big reveal the show does open a major plot hole. If Barry truly wants to keep his love safe from harm he can make the same sacrifice Eddie made back in the show's First Season making it impossible for an older version of himself to kill Iris (Candice Patton).

It's also important to note that despite the chaos and internal struggle she might be creating in her friends, Caitlin's dark turn hasn't been all that dark to this point. She's hardly gone past the point of no return as the show continues to hedge its bets on the character unwilling to close the door the possibility of her returning to life with her friends. With only three episodes left this season the show's writers are going to eventually have to make a decision about the character's long-term future (or lack of one) on the show. As for Barry, they're going to have to pull one hell of a rabbit out of their hats to explain any version of Barry being responsible for Iris' death.