The CW has released the official episode description for the 4th episode of Supergirl season 6. Supergirl season 6 episode 4 is titled “Lost Souls”.
Supergirl 6×4 “Lost Souls” Episode Guide
Supergirl (Melissa Benoist) finds an opportunity to escape from the Phantom Zone but it comes with some dangerous strings attached. Meanwhile, Lena (Katie McGrath) joins the Super Friends on a mission but finds she disagrees with their plan of action against the Phantoms and wonders if she is truly ready to be a part of the team.
Karen E. Maser & Nicki Holcomb written the episode directed by Alysse Leite-Rogers. Supergirl season 6 episode 4 airs on April 20 at 9|8c on The CW.