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.