The Flash (2014): Season 2, Episode 10

2 - 10: Potential Energy

Now that they’ve grown closer, Barry (Grant Gustin) considers telling Patty (guest star Shantel VanSanten) that he is The Flash. Meanwhile, Joe (Jesse L. Martin) and Iris (Candice Patton) try to get to know Wally (Keiynan Lonsdale), and the team hunts down a meta-human who can slow time itself.