Supergirl Lives Clip: The Girl of Steel Loses Her Powers The CW has released a new clip for the mid-season premiere of Supergirl, which you can check out in the player below! Titled “Supergirl Lives” the episode is directed by Kevin Smith and is officially described as follows: “Kara (Melissa Benoist) is moved by the story of a missing woman named Izzy (guest star Harley Quinn Smith) and decides to investigate despite Snapper Carr’s (guest star Ian Gomez) order to leave it alone.