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: 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

Supergirl recap: Season 3, Episode 16 - Entertainment Weekly You have requested : Supergirl.S03E16.MP4.LEG.B...

: Kara and the team are shocked to find Sam in a secret lockdown at L-Corp, realizing Lena has been hiding this truth for days. : The episode ends with Purity and Pestilence

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

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 .