|Season 2, Episode 5|
|Woman of Tomorrow||Challenge of the Superfriends|
Invincible is the fifth episode of The Last Children of Krypton Season 2 and the 20th episode overall. It is the second part of the 2-part ULTIMATUM arc.
PART 2: NEVER DIE- Reign makes her way to Metropolis, where she blackmails Talia al Ghul into signing over L-Corp to her. Lena Luthor must work with Lillian Luthor and LX-52 to defend her company's future from the alien terrorist. Kara Danvers, Alex Danvers, James Olsen, and Karen Starr team up with Kate Kane and Onyx to defeat members of a cult. Lucy Lane and Lois Lane do damage control in the wake of Reign's latest move.
- Melissa Benoist as Kara Danvers/Supergirl
- Chyler Leigh as Alex Danvers
- Katie McGrath as Lena Luthor
- Odette Annable as Reign/Samantha Arias
- Tyler Hoechlin as Clark Kent (credit only)
- Olivia Wilde as Susannah Russo (credit only)
- Jenna Dewan-Tatum as Lucy Lane
- Minka Kelly as Lois Lane
- Claire Holt as Karen Starr/Power Girl
- Tamzin Merchant as Lyra Strayd (credit only)
- Michael Rosenbaum as LX-52
- Oded Fehr as Ra's al Ghul
- Dichen Lachman as Talia al Ghul
- Emmanuelle Chriqui as Kate Kane
- Rachel Nichols as Onyx
- Brit Morgan as Livewire (credit only)
- Brenda Strong as Lillian Luthor
- Daniel Sharman as Lor-Zod (credit only)
- Teressa Liane as Mary Louise Fairchild (credit only)
- Scarlett Byrne as Nora Fairchild (credit only)
- Lili Reinhart as Aethryr (credit only)
- with David Harewood as J'onn J'onzz (credit only)
- with Mehcad Brooks as James Olsen
- and Helen Slater as Eliza Danvers
- Antagonists: Reign, Ra's al Ghul
- Title Meaning: Kara and Reign's brawl atop L-Corp tower in full view of several news cameras and multiple citizens, mirroring their first fight in the original timeline. It also refers to public opinion being turned against Kryptonians in the wake of the events of the series thus far. More specifically, the title is taken from Alex's quote "You may be invincible physically, Kara, but I remember how much a trial by social media hurt you".
- Clark, Susannah, Lyra, Livewire, Lor, Mary Louise, Nora, Aethryr, and J'onn do not appear in this episode.
- The majority of this episode takes place inside the L-Corp HQ in Metropolis.
- The episode was originally titled All The World Could Rise Against Us.
- This episode is named after the song of the same name by All Good Things.
- This episode formally introduces Rao's Fire, a cult dedicated to serving Reign.