By Philiana Ng Katie Yu/The CW
Supergirl star Chyler Leigh steps behind the camera to direct Tuesday s episode of The CW superhero drama and it s not your typical hour of high-flying action. The conclusion of a two-part flashback arc set in 2009 Midvale, which turns back the dial to further explore the dynamics between Kara Danvers (Izabela Vidovic) and her sister, Alex (Olivia Nikkanen), in their younger years, picks up right where things left off. As young Kara experiences kryptonite for the first time, a young Cat Grant or CJ here (guest star Eliza Helm), may be the reason Supergirl never gets out of the Phantom Zone.