Supergirl: Elseworlds

"Elseworlds" is the ninth episode of season four of the superhero fantasy series Supergirl and the sixty-ninth episode of the series overall. It was directed by Armen V. Kevorkian with a screenplay written by Katie Rose Rogers and Jessica Kardos based on a story treatment by Eric Carrasco. It first aired on the CW Network on Sunday, December 11th, 2018 at 8:00 pm.