Watch Supergirl Season 3 Episode 1 Online
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- COUNTRIES: United States of America
- Subtitles: English
Kara deals with the loss of Mon-El by focusing all her energy on being Supergirl and the mysterious new threat against National City. Alex confesses a secret to Maggie about their impending nuptials. A citizen of National City has a mysterious connection to Kara, and Lena makes a bold move.