Supergirl Season 4 is set to begin with the episode "American Alien," which will air on Oct. 14 at 8 pm ET/PT. The episode will mark Kara Danvers' return to the world of journalism as she takes a brand-new CatCo reporter under her wing.
This season premiere will also see Supergirl take on and possibly uncover the secrets of an anti-alien terrorist organization. Speaking of aliens, it also sounds like Martian Manhunter may be tempted to get back into the fight.
Additionally, viewers will also see James Olsen dealing with the hot water he has gotten himself in thanks to his exploits as the costumed hero known as Guardian, as well as the folks down at the DEO dealing with some issues of their own.
The official synopsis for “American Alien” can be found below:
HOPE VS. FEAR — Diving back into reporting, Kara (Melissa Benoist) welcomes a new cub reporter to CatCo. Meanwhile, James (Mehcad Brooks) and Lena (Katie McGrath) argue about James’ impending indictment for acting as the vigilante Guardian, while Alex (Chyler Leigh) and Brainy (Jesse Rath) struggle to get in sync at the DEO. Supergirl (Melissa Benoist) is called into action when remnants of the anti-alien terrorist organization Cadmus try to assassinate pro-alien leaders, but their endgame turns out to be much more sinister than she expected. J’onn (David Harewood) relishes his peaceful new life, but an outing with an old friend causes him concern. Jesse Warn directed the episode with story by Robert Rovner & Jessica Queller and teleplay by Gabriel Llanas & Aadrita Mukerji (#401). Original airdate 10/14/2018
Starring Melissa Benoist as Kara Danvers, David Harewood as Martian Manhunter, Mehcad Brooks as Jimmy Olsen, and Chyler Leigh as Alex Danvers, Supergirl returns for its fourth season on Sunday, Oct. 14, at 8 pm ET/PT on The CW.