When "The Flash" returns on January 19, Wally West (Keiynan Lonsdale) will have a lot to learn about meta humans, speedsters, and his crime fighting family. Check out the photos below of the upcoming episode, "Potential Energy."

JOE AND IRIS GET TO KNOW WALLY - 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. Rob Hardy directed the episode written by Bryan Q. Miller.

"The Flash's" spring return, "Potential Energy," airs Tuesday January 19 at 8/7C on The CW.