Arrowverse Wiki
Arrowverse Wiki

Supergirl was renewed for a sixth and final season by The CW on January 7, 2020.[1][2] Due to the coronavirus pandemic, the CW announced on May 14, 2020 that their regular season would start in January 2021 rather than October 2020 as usual. Along with this, they announced that Supergirl would return midseason.[3] On September 22, 2020, it was announced that this would be the final season.[4] It premiered on March 30, 2021.



Main cast

Recurring cast

Confirmed plot points



  • This season was rumored to begin filming mid-April to accommodate Melissa Benoist's pregnancy, but this plan was rendered obsolete once the COVID-19 shutdowns forced delays on all television productions. Filming resumed, tentatively, in September alongside the other Arrowverse shows.
    • Melissa stated in an interview that her maternity leave wouldn't be over until January.[15]
    • However, before production could even begin, Supergirl had to shut down on September 30 due to delays in processing COVID-19 tests in British Columbia. Luckily, the stoppage was temporary.[16]
    • On October 7, 2020, production was allowed to resume.
  • This season marks the directorial debut of Chyler Leigh.
  • This season is the first and only season to feature new series regular Peta Sergeant (Nyxlygsptlnz), who's credited from "Phantom Menaces" onwards.
  • This season is also the first season to:


Promotional images



  1. "The CW Renews 13 Series Including 'Batwoman', 'Nancy Drew', 'The Flash', 'Riverdale', 'All American'" - Deadline
  2. "'Supergirl' to End With Season 6 at CW" - Variety
  3. "CW Delays New Season Until 2021: Superman to Follow Flash, Walker Fills Winchester Void, Supergirl Delayed" - TVLine
  4. 4.0 4.1 "'Supergirl' To End With Upcoming Season 6 On The CW" - Deadline Hollywood
  5. 5.0 5.1 5.2 5.3 "Supergirl bosses confirm Kelly picks up the Guardian mantle in season 6" - Entertainment Weekly
  6. 6.0 6.1 "David Ramsey To Direct, Return As John Diggle & Mystery Character In The CW's Arrowverse" - Deadline
  7. 7.0 7.1 7.2 "First Look Photo: Azie Tesfai is Supergirl’s New Guardian" - KryptonSite
  8. "Supergirl: Thomas Lennon Teases Return as Mr. Mxyzptlk" - Comic Book
  9. 9.0 9.1 9.2 9.3 "Recently Added Episode Titles - Various Shows - 5th May 2021" - Spoiler TV
  10. "The CW Sets Summer Premieres For Final ‘Supergirl’ Season, ‘DC’s Stargirl’, ‘Roswell, NM’ & More; ‘Riverdale’ Moves To August" - Deadline
  11. Azie Tesfai (@AzieTesfai) - Twitter
  12. "Supergirl: Azie Tesfai To Co-Write Final Season Episode" -
  13. "Supergirl - Episode 6.16 - Nightmare In National City - BTS Set Photos" - Spoiler TV
  14. 14.0 14.1 Eric Dean Seaton (@ericdeanseaton) - Instagram
  15. "Exclusive: Sarah Hyland, Katharine McPhee, Camila Morrone and More Showed Up For a Very 2020 Party" - InStyle
  16. "'Riverdale,' 'Supergirl' Pause Production Amid COVID-19 Testing Bottleneck in Vancouver" - The Hollywood Reporter