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Supergirl -- "Alex in Wonderland" -- Image Number: SPG516a_0033b.jpg -- Pictured (L-R): Chyler Leigh as Alex Danvers and Olivia Nikkanen as Young Alex -- Photo: Sergei Bachlakov/The CW -- © 2020 The CW Network, LLC. All rights reserved.

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Supergirl -- "Alex in Wonderland" -- Image Number: SPG516a_0060b.jpg -- Pictured: Jesse Rath as Brainiac-5 -- Photo: Sergei Bachlakov/The CW -- © 2020 The CW Network, LLC. All rights reserved.

(4 of 15)

Supergirl -- "Alex in Wonderland" -- Image Number: SPG516a_0110b.jpg -- Pictured: David Harewood as Hank Henshaw/J'onn J'onzz -- Photo: Sergei Bachlakov/The CW -- © 2020 The CW Network, LLC. All rights reserved.

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Supergirl -- "Alex in Wonderland" -- Image Number: SPG516a_0114b.jpg -- Pictured: David Harewood as Hank Henshaw/J'onn J'onzz -- Photo: Sergei Bachlakov/The CW -- © 2020 The CW Network, LLC. All rights reserved.

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Supergirl -- "Alex in Wonderland" -- Image Number: SPG516a_0499b.jpg -- Pictured: Chyler Leigh as Alex Danvers -- Photo: Sergei Bachlakov/The CW -- © 2020 The CW Network, LLC. All rights reserved.

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Supergirl -- "Alex in Wonderland" -- Image Number: SPG516a_0533b.jpg -- Pictured: Chyler Leigh as Alex Danvers -- Photo: Sergei Bachlakov/The CW -- © 2020 The CW Network, LLC. All rights reserved.

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Supergirl -- "Alex in Wonderland" -- Image Number: SPG516a_0646b.jpg -- Pictured: Chyler Leigh as Alex Danvers -- Photo: Sergei Bachlakov/The CW -- © 2020 The CW Network, LLC. All rights reserved.

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Supergirl -- "Alex in Wonderland" -- Image Number: SPG516b_0010b.jpg -- Pictured: Julie Gonzalo as Andrea Rojas/Acrata -- Photo: Sergei Bachlakov/The CW -- © 2020 The CW Network, LLC. All rights reserved.

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Supergirl -- "Alex in Wonderland" -- Image Number: SPG516b_0016b.jpg -- Pictured (L-R): Julie Gonzalo as Andrea Rojas/Acrata and Andrea Brooks as Eve Tessmacher -- Photo: Sergei Bachlakov/The CW -- © 2020 The CW Network, LLC. All rights reserved.

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Supergirl -- "Alex in Wonderland" -- Image Number: SPG516b_0109b.jpg -- Pictured (L-R): Azie Tesfai as Kelly Olsen and Julie Gonzalo as Andrea Rojas/Acrata -- Photo: Sergei Bachlakov/The CW -- © 2020 The CW Network, LLC. All rights reserved.

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Supergirl -- "Alex in Wonderland" -- Image Number: SPG516b_0236b.jpg -- Pictured (L-R): Azie Tesfai as Kelly Olsen and Staz Nair as William Dey -- Photo: Sergei Bachlakov/The CW -- © 2020 The CW Network, LLC. All rights reserved.

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Supergirl -- "Alex in Wonderland" -- Image Number: SPG516b_0422b.jpg -- Pictured (L-R): Azie Tesfai as Kelly Olsen and Staz Nair as William Dey -- Photo: Sergei Bachlakov/The CW -- © 2020 The CW Network, LLC. All rights reserved.

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Supergirl -- "Alex in Wonderland" -- Image Number: SPG516b_0441b.jpg -- Pictured (L-R): Staz Nair as William Dey and Azie Tesfai as Kelly Olsen -- Photo: Sergei Bachlakov/The CW -- © 2020 The CW Network, LLC. All rights reserved.

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Supergirl -- "Alex in Wonderland" -- Image Number: SPG516b_0453b.jpg -- Pictured: Azie Tesfai as Kelly Olsen -- Photo: Sergei Bachlakov/The CW -- © 2020 The CW Network, LLC. All rights reserved.