- "I mean my sister, she can be a handful. So I thought if I came in here, um... I could just feel some freedom for myself. I could fly around, I could knock things down without anyone being able to stop me, and then I would, I would feel better, but I don't. I mean, not, not really. Because, I mean, my dad's still dead."
- —Alex Danvers entering into Obsidian Platinum
|Alex uses a pair of Obsidian contact lenses to visit a virtual National City where she takes on a whole new persona. Meanwhile, Kelly helps William investigate Lex. Kara deals with difficult news.|
Alex and Kara are arguing about Alex's refusal to go to their father's memorial. Insisting he has already died multiple times, even after they helped him escape, unbeknownst to them this entire time he was living close by and never once chose to reach out. Kara says it's not about Jeremiah, it's about being there for their mom, and paying respect to his memory in spite of his latest actions. Alex is too upset, insisting even when they were kids, he paid more attention to Kara, concerning himself with her secret. Kara refuses to engage with her sister, and decides to go on ahead without her. J'onn decides to go on ahead with Kara, and Kelly promises to try to work on Alex, though it's clear both sisters are furious with each other. Kelly, now left alone in the apartment with Alex, tries to persuade her against drinking more wine, and Alex only wants to be left alone. Kelly goes to work but urges Alex to reconsider about not going to her dad's funeral. Once alone, Alex is bothered by another propaganda commercial of her sister on TV. She decides to try the new VR Obsidian Platinum lenses that were left behind by Kelly as a prototype. She is once again in the lobby with her options before her, not currently interested in her desire to be a mom, she decides to pick being Supergirl.
William finds Kelly at work and the two discussed the Danvers sisters. Kelly says she's keeping her phone close in hopes Alex would change her mind. He discusses the missing persons' report and asked Kelly to look into it. Kelly later finds her boss Andrea and informs her of the broken escape link inside the game. Andrea insists the glitch was fixed, but bureaucracy was holding up the funding and she would look into it.
Inside Alex’s fantasy world, she is at the mall and first greeted by Bonnie who is dressed up as Indiana Jones. She explains the game to her and how to identify non-player characters from players like themselves. They watch a live performance from Derek, before Bonnie is called away and climbs a rope to a helicopter through the mall ceiling. In reality, the guitar player is trapped inside VR, as his physical body is with a multitude of other people wrapped in silver in a specified laboratory. The VR mall is attacked by a dragon-dinosaur and Alex saves them. Afterwards Alex goes to a bar, and again runs into Bonnie's Indiana Jones. However this time it becomes more evident that she is less and less aware she is inside a virtual reality. Bonnie’s real-life body is inside a trailer, her lenses have also turned red and she is unresponsive. A group of people discreetly take her away.
Alex was called away by the D.E.O., where she finds Brainy and J'onn, who inform her that Hank Henshaw, the real Hank Henshaw, has somehow escaped and has now kidnapped her sister Kara. Alex immediately gets on the situation and flies off to confront Hank. They find each other in a dark abandoned building, and immediately begin to fight. Alex eventually gets the upper hand and defeats him. Alex has a heart-to-heart with J'onn outside on the balcony of the D.E.O. It is becoming more and more clear Alex believes she is the real Supergirl. Inside a bar, now fully unaware she is in a virtual reality, Alex, J'onn and Brainy comment on a president Abraham Lincoln's karaoke singing. He is taken off stage and once again she is greeted by Indiana Jones, completely oblivious to her change in personality as well. While ordering a drink she receives it on the house for saving the city. She is taken aback when she sees another Supergirl. The two greet each other and Alex is confused when she talks about how great this virtual reality is, and how everyone is entitled to free drinks as the bartender gives her two on the house, as she compliments her on her black style of the stereotypical Supergirl uniform. Alex is left confused, and immediately begins to panic. She forces herself to wake up and find herself inside her apartment and takes out her VR lenses. She is relieved to be out of the virtual reality, and upon hearing danger, dons her Supergirl outfits and flies off, still unknowingly stuck inside the reality.
Back in the real world at Alex's physical apartment, Kelly finds her and sees her contacts have turned red. She tries to call from the game by turning it off, but when she is unable, she puts on a pair to follow her. Alex is just finished capturing Psi and putting her in a cell. Kelly finds her with Brainy and J'onn, and tries to call her back out of the reality. Kelly is left shocked when Alex clearly believes she is Supergirl and doesn't understand. They are worried that something has happened to Kelly and the boys try to take her away to be examined. Kelly immediately exits herself from the game. On the outside, Kelly contacts Andrea to explain to her the situation, and they make an artificial character of Alex as a teenager in order to communicate with her through the game. Inside the game, Alex just stopped a robbery, and when she takes off the masks of one of the robbers, she sees it is her teenage self. She's speaking to her on behalf of Kelly and tries to explain to her that none of this is real. Alex, again refuses to believe. The two Alexs find themselves together trapped in a laboratory where her friends and own mother are trying to call her away, insisting something else is wrong and she needs to stay with them. Alex eventually does believe younger Alex and recalls herself from the game. She was scared having not been able to escape and Kelly comforts her. She decides to change her mind about not going to her father's funeral.
William has spent the entire day tracking down the lists of names of people that have gone missing after putting on the contact lenses. After learning that 100 out of 100 of them have simply been binge existing inside the VR game, he decides to contact a friend in NSR who checks out 402 of the users. He discovers 336 of them are VR geeks, and much to Williams disappointment it doesn't connect to Lex Luthor like he had hoped. However the list of remaining names are all located at the same address, and unreachable. William immediately goes there but Margot Morrison is able to physically shield everything from him. He leaves empty-handed.
Andrea finds one of the tech-workers, Eve Teschmacher and instructs absolutely nothing else goes forward on the obsidian lenses until the exit function is fixed, as well as its back-up. Alex eventually arrives at the church to find her mother, Kara, J'onn Nia and Brainy. They remain in respectable silence as their mother gives a final farewell speech to her husband.
- Melissa Benoist as Kara Danvers and NPC Kara Danvers
- Chyler Leigh as Alex Danvers/Supergirl
- Katie McGrath (credit only)
- Jesse Rath as Querl Dox/Brainiac 5 and NPC Querl Dox
- Nicole Maines as Nia Nal and NPC Dreamer
- Azie Tesfai as Kelly Olsen
- Andrea Brooks as Eve Teschmacher
- Julie Gonzalo as Andrea Rojas
- Staz Nair as William Dey
- David Harewood as J'onn J'onzz, NPC J'onn J'onzz and NPC Hank Henshaw
Special guest star
- Olivia Nikkanen as NPC young Alex Danvers
- Patti Allan as Margot Morrison
- Rosemary Hochschild as VR Vita
- Anne Hollister as Bonnie/Tilly
- John Murphy as Derek
- Steph Song as VR Supergirl
- Jina Anika as NPC Police Officer
- Neetu Garcha as NPC Reporter
- Marc Gaudet as Mac
- Peter Hall as NPC Abraham Lincoln
- Arran Henn as Reporter
- Off-screen Jeremiah Danvers has died after suffering from cardiac arrest, but in the next episode, "", Jeremiah didn't die of a heart attack. He was murdered by Eve Teschmacher who ordered the hit on Jeremiah by Lex Luthor.
- Though it was a hit, the heart attack was from a foreign substance.
- The title is a reference to Lewis Carroll novel Alice's Adventures in Wonderland, or Alice in Wonderland.
- The song Derek is playing is a remix of the show's theme.
- On March 23, The CW had a Lewis Carroll's Alice In Wonderland theme with and each having an episode named after the Alice books: With "Alex In Wonderland" and "".
- It should be noted, in Batwoman's season 1, every episode (excluding "" and "") has been named after an Alice in Wonderland chapter.
- This episode marks the return of Andrea Brooks as she hasn't appeared since "".
- This also marks the first appearance of Eve Teschmacher since "", 14 episodes ago.
- This is also the first appearance of the character Post-Crisis.
- When "Hank Henshaw" calls "Supergirl" about "Kara", he uses a frequency only "Supergirl" can hear, commenting that she would be the "only one with less than four legs that could hear him." This is a direct line from "Superman: The Movie", where Lex Luthor talks privately with Superman.
- When Kelly injects Alex with the epipen, she does not remove the blue tab at the top, which is needed in order for the injection to work.
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