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The Supergirl Season Finale Airs Tonight

SupergirlSupergirl SpoilersVideos 283 Craig Byrne June 18, 2018

Craig Byrne

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Tonight (June 18) marks the end of the third season of Supergirl.

Season 3 ends with an episode titled “Battles Lost and Won” and The CW has released an “Inside” video, an interview with Melissa Benoist, a preview clip, and a trailer to promote it. You can find all of that below.

Below, find some photos and an official description for “Battles Lost and Won.” If you’d like to join the countdown on our forum, you can find it here! And yes, Supergirl will be back for Season 4, where it will be airing on Sundays!

 

SHOCKING SEASON FINALE — Supergirl (Melissa Benoist) and team take on Serena in an epic battle for Earth. Jesse Warn directed the episode written by Robert Rovner & Jessica Queller (#323). Original airdate 6/18/2018.

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Supergirl -- "Battles Lost And Won" -- Image Number: SPG323a_0042.jpg -- Pictured (L-R): Melissa Benoist as Kara/Supergirl and Chris Wood as Mon-El -- Photo: Katie Yu/The CW -- © 2018 The CW Network, LLC. All Rights Reserved.

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Craig Byrne

Craig Byrne has been writing about Superman TV since 1995, when the "Lois & Clark Krypton Club" launched. He founded KryptonSite.com in February 2001, becoming the first fan site for The WB/CW television series Smallville. He also wrote the Official Companion books for Smallville seasons 4-7 as well as the Smallville Visual Guide.

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About KryptonSite

In a time before social media, Craig Byrne created KryptonSite as the ultimate fan destination for The WB/CW series Smallville which starred Tom Welling, Michael Rosenbaum, Kristin Kreuk, Erica Durance and more. In the decades since, KryptonSite has grown to cover newer Superman-related TV and movie projects while still always holding on to Smallville.

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Copyright © 2026 Craig Byrne & KryptonSite and the respective original authors of posts. Smallville, Kryptonite and other Superman-related items are the property of DC Comics. No infringement is intended.

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