"Better Angels" -- Supergirl (Melissa Benoist, left) is forced to do battle with an unexpected foe and must risk everything -- including her life -- to prevent Non and Indigo from destroying every person on the planet, on the first season finale of SUPERGIRL, Monday, April 18 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Also pictured: Peter Facinelli (right) Photo: Cliff Lipson/CBS ÃÂ©2016 CBS Broadcasting, Inc. All Rights Reserved | Episode 1.20 - Better Angels (Season Finale) | Promotional Episode Photos | Season 1 | Supergirl | Gallery

SpoilerTV Image Archive | Gallery | Supergirl | Season 1 | Promotional Episode Photos | Episode 1.20 - Better Angels (Season Finale) | "Better Angels" -- Supergirl (Melissa Benoist, left) is forced to do battle with an unexpected foe and must risk everything -- including her life -- to prevent Non and Indigo from destroying every person on the planet, on the first season finale of SUPERGIRL, Monday, April 18 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Also pictured: Peter Facinelli (right) Photo: Cliff Lipson/CBS ÃÂ©2016 CBS Broadcasting, Inc. All Rights Reserved

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