When Jensen--the new Parasite--attacks aliens, Supergirl is forced to take to the sidelines rather than give him further power. As a result, Kara writes an article on an alien healer who makes him a target. Meanwhile, Alex learns some surprising things about her new superior, and James comes to a realization about the Children of Liberty and their anti-alien agenda.
Supergirl Season 4, Episode 5 - Parasite Lost
Airdate: Nov 11, 2018