New to the cast for the fourth season is Sam Witwer as hero Agent Liberty, Rhona Mitra as Mercy Graves, and Brent Spiner as Vice President Baker.
Featuring a closer look at one of season four’s newest villains, Agent Liberty played by Sam Witwer as he prepares for his war against aliens, you can check out the video below!
RELATED: New Supergirl Season 4 Poster and Premiere Photos Unleashed!
Ahead of the show’s return this Sunday, The CW has released a new promo trailer for the upcoming fourth season premiere of their DC superhero series Supergirl.