Kara (Melissa Benoist) and Mon-El (Chris Wood) discovered a meteor that was a surviving part of Krypton on the latest episode of Supergirl.
In search for a rock to help Lena (Katie McGrath) create a cure for Sam (Odette Annable), Kara was shocked to discover that her mother Alura (Erica Durance) was still alive. Alura organised a meeting with the High Council to discuss Reign and it was revealed that Selina (Anjali Jay), who is secretly a Dark Priestess, was part of it.
As Kara and Mon-El returned to National City, Reign broke free from Lena’s containment and a battle began.
Meanwhile Alex (Chyler Leigh) was targeted by the brother of a criminal she killed. With J’onn’s (David Harewood) help, they set a trap to capture her would-be killer.
[brid video=”254573″ player=”531″ title=”Supergirl 3×21 Extended Promo “Not Kansas” (HD) Season 3 Episode 21 Extended Promo”]
The next episode of the season is Not Kansas. Kara’s caught in a conundrum as she considers a major life change. Meanwhile, J’onn’s shocked to learn DEO-calibre guns have hit National City’s streets.
Tune in to Sky 1 HD at 8pm on Monday to see the episode. Preview it with our gallery below: