"We both know the danger that Parasite poses."
"That he can kill me and get supercharged at the same time? Yes, I—I get it. But that doesn't mean I don't wanna go out there and fight him."
Alex Danvers and Kara Danvers on Raymond Jensen
"Parasite Lost" is the fifth episode of the fourth season of Supergirl, and the seventieth episode overall. It aired on November 11, 2018.


Colonel Haley makes a surprising decision regarding Supergirl. Kara writes a series of articles highlighting aliens in National City in the hopes that humans will stop being so fearful of them. Unfortunately, the article puts some of the aliens in harm's way.[src]


  • The episode's title is a play on the John Milton epic poem Paradise Lost.
  • The episode was previously titled "Parallax".[1]
  • The People's Veritas is most likely an allusion to the extremist conservative organization Project Veritas.


  • When Kara and Nia are reading the comments about Kara's interview with Amadei Derros, the first post has the possessive form of Kara's last name, Danvers, punctuated incorrectly as "Danver's".


  1. "Supergirl - Episode 4.05 - 4.07 Titles Revealed" - Spoiler TV
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