The American Alien

With Superman off-world, Supergirl becomes a worldwide beacon of hope. Meanwhile, Lena takes secret measures to keep James out of prison, while Kara welcomes a new report to CatCo and Alex and Brainiac-5 get off to a rocky start after the latter takes Winn's position at the DEO.

Supergirl Season 4, Episode 1 - The American Alien

Airdate: Oct 14, 2018