Welcome to Earth

"Welcome to Earth" is the third episode of the second season of Supergirl. It will air on October 24, 2016.

Synopsis
An attack is made on the President as hot-button, alien vs. human rights issues heat up in National City. Supergirl and the D.E.O. are assigned to protect the President and bring in the responsible party. Alex teams up with Detective Maggie Sawyer to investigate the case while Kara searches for a recently escaped Mon-El, who she fears may be the alien behind the assault.

Starring

 * Melissa Benoist as Kara Danvers/Supergirl
 * Mehcad Brooks as James Olsen
 * Chyler Leigh as Alex Danvers
 * Jeremy Jordan as Winn Schott
 * Chris Wood as Mon-El
 * Floriana Lima as Maggie Sawyer
 * David Harewood as J'onn J'onzz/Martian Manhunter

Special Guest Star

 * Lynda Carter as Olivia Marsdin

Guest Starring

 * Katie McGrath as Lena Luthor

Trivia

 * This is the first episode of the series to not feature Cat Grant, following Calista Flockhart being downgraded to recurring.