Supergirl recap: Season 3, Episode 16 - Entertainment Weekly

: The episode ends with Purity and Pestilence breaking into L-Corp to rescue Sam. As they join hands, Sam fully transforms into Reign, and the three Worldkillers fly off after uttering the Kryptonian phrase "El mayarah" —stronger together. Technical and Production Notes

: It is revealed that Imra and Brainiac-5 went behind Supergirl's back to track Pestilence , a move that briefly strains their partnership until they reconcile to save the city. The Reign Revelation

Reviewers noted that while the episode had emotional weight, especially in the scenes between Winn and James, the hero's powerlessness against the united Worldkillers set a grim tone for the remainder of the season. For more in-depth episode analysis, you can visit the Arrowverse Wiki or Rotten Tomatoes .

: The virus initially appears as a scratch on the hand and spreads quickly among citizens, including Alex Danvers and Winn Schott.

While the DEO hunts Pestilence , Lena Luthor continues her secret experiments on Sam Arias at L-Corp to isolate the "Reign" personality.