The CW network has released the synopsis for episode #203 of Supergirl, which you can check out below. The installment, titled “Welcome to Earth,” is officially described as follows:
LYNDA CARTER (“WONDER WOMAN”) LANDS IN NATIONAL CITY AS PRESIDENT OLIVIA MARSDIN — An attack is made on the President (guest star Lynda Carter) as hot-button, alien vs. human rights issues heat up in National City. Supergirl (Melissa Benoist) and the DEO are assigned to protect the President and bring in the responsible party. Alex (Chyler Leigh) teams up with Detective Maggie Sawyer (Floriana Lima) to investigate the case while Kara searches for a recently escaped Mon-El (Chris Wood), who she fears may be the alien behind the assault.
Supergirl “Welcome to Earth” was directed by Rachel Talalay and written by Jessica Queller and Derek Simon. The episode airs Monday, October 24, at 8pm on The CW.