The CW is getting a look at the next episode of Supergirl that’s set to arrive with “O Brother, Where Art Thou?,” which is scheduled for a March 17th, 2019 debut. The 15th episode of the 4th season, it’s directed by Tawnia McKiernan based on the screenplay by Derek Simon and Nicki Holcomb.
The series airs on The CW with streaming the day after through their site and app.
The main cast includes Melissa Benoist as Kara Danvers / Kara Zor-El / Supergirl, Mehcad Brooks as James Olsen / Guardian, Chyler Leigh as Alex Danvers, Katie McGrath as Lena Luthor, Jesse Rath as Querl “Brainy” Dox / Brainiac 5, Sam Witwer as Ben Lockwood / Agent Liberty, Nicole Maines as Nia Nal / Dreamer, April Parker Jones as Colonel Lauren Haley, and David Harewood as J’onn J’onzz / Martian Manhunter.
Season Concept: The season follows Kara, a reporter and superpowered alien who fights against those who threaten Earth, and the fallout of her use of mysticism and time traveling.