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Supergirl -- "Stranger Beside Me" -- Image Number: SPG502a_0060b.jpg -- Pictured (L-R): Melissa Benoist as Kara/Supergirl, Mehcad Brooks as James Olsen/Guardian and David Harewood as Hank Henshaw/JÕonn JÕonzz -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

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Supergirl -- "Stranger Beside Me" -- Image Number: SPG502a_0063b.jpg -- Pictured: Mehcad Brooks as James Olsen/Guardian -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

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Supergirl -- "Stranger Beside Me" -- Image Number: SPG502a_0094b.jpg -- Pictured (L-R): Mehcad Brooks as James Olsen/Guardian, Melissa Benoist as Kara/Supergirl, David Harewood as Hank Henshaw/JÕonn JÕonzz and Jesse Rath as Brainiac-5 -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

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Supergirl -- "Stranger Beside Me" -- Image Number: SPG502a_0121b.jpg -- Pictured (L-R): Mehcad Brooks as James Olsen/Guardian, Chyler Leigh as Alex Danvers and Melissa Benoist as Kara/Supergirl -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

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Supergirl -- "Stranger Beside Me" -- Image Number: SPG502a_0169b.jpg -- Pictured: Melissa Benoist as Kara/Supergirl -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

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Supergirl -- "Stranger Beside Me" -- Image Number: SPG502a_0194b.jpg -- Pictured: Jesse Rath as Brainiac-5 -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

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Supergirl -- "Stranger Beside Me" -- Image Number: SPG502a_0238b.jpg -- Pictured: Azie Tesfai as Kelly Olsen -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

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Supergirl -- "Stranger Beside Me" -- Image Number: SPG502a_0395b.jpg -- Pictured (L-R): Azie Tesfai as Kelly Olsen and David Harewood as Hank Henshaw/JÕonn JÕonzz -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

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Supergirl -- "Stranger Beside Me" -- Image Number: SPG502a_0411b.jpg -- Pictured (L-R): Azie Tesfai as Kelly Olsen, Mehcad Brooks as James Olsen/Guardian and David Harewood as Hank Henshaw/JÕonn JÕonzz -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

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Supergirl -- "Stranger Beside Me" -- Image Number: SPG502a_0473b.jpg -- Pictured: David Harewood as Hank Henshaw/JÕonn JÕonzz -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

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Supergirl -- "Stranger Beside Me" -- Image Number: SPG502b_0023b.jpg -- Pictured: Katie McGrath as Lena Luthor -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

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Supergirl -- "Stranger Beside Me" -- Image Number: SPG502b_0037b.jpg -- Pictured: Katie McGrath as Lena Luthor -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

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Supergirl -- "Stranger Beside Me" -- Image Number: SPG502b_0053b.jpg -- Pictured: Katie McGrath as Lena Luthor -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

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Supergirl -- "Stranger Beside Me" -- Image Number: SPG502b_0402b.jpg -- Pictured: Julie Gonzalo as Andrea Rojas -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

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Supergirl -- "Stranger Beside Me" -- Image Number: SPG502b_0412b.jpg -- Pictured (L-R): Katie McGrath as Lena Luthor and Julie Gonzalo as Andrea Rojas -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

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Supergirl -- "Stranger Beside Me" -- Image Number: SPG502b_0428b.jpg -- Pictured (L-R): Julie Gonzalo as Andrea Rojas and Katie McGrath as Lena Luthor -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

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Supergirl -- "Stranger Beside Me" -- Image Number: SPG502c_0039r.jpg -- Pictured: Staz Nair as William Dey -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

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Supergirl -- "Stranger Beside Me" -- Image Number: SPG502b_0198b.jpg -- Pictured (L-R): Andrea Brooks as Eve Tessmacher and Katie McGrath as Lena Luthor -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

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Supergirl -- "Stranger Beside Me" -- Image Number: SPG502b_0280b.jpg -- Pictured (L-R): Andrea Brooks as Eve Tessmacher and Katie McGrath as Lena Luthor -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

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Supergirl -- "Stranger Beside Me" -- Image Number: SPG502b_0486b.jpg -- Pictured: Andrea Brooks as Eve Tessmacher -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.