Supergirl: Season 3 Episode 17
Trinity
Still reeling after learning about Lena’s secret, Supergirl asks Guardian for a favor that could alter his relationship with Lena forever. Meanwhile, with all three Worldkillers united, Supergirl and the team brace for an epic battle.
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Opensubtitles
3 - 1Girl of Steel Oct. 09, 2017
3 - 2Triggers Oct. 16, 2017
3 - 3Far From the Tree Oct. 23, 2017
3 - 4The Faithful Oct. 30, 2017
3 - 5Damage Nov. 06, 2017
3 - 6Midvale Nov. 13, 2017
3 - 7Wake Up Nov. 20, 2017
3 - 8Crisis on Earth-X (I) Nov. 27, 2017
3 - 9Reign Dec. 04, 2017
3 - 10Legion of Super-Heroes Jan. 15, 2018
3 - 11Fort Rozz Jan. 22, 2018
3 - 12For Good Jan. 29, 2018
3 - 13Both Sides Now Feb. 05, 2018
3 - 14Schott Through the Heart Apr. 16, 2018
3 - 15In Search of Lost Time Apr. 23, 2018
3 - 16Of Two Minds Apr. 30, 2018
3 - 17Trinity May. 07, 2018
3 - 18Shelter from the Storm May. 14, 2018
3 - 19The Fanatical May. 21, 2018
3 - 20Dark Side of the Moon May. 28, 2018
3 - 21Not Kansas Jun. 04, 2018
3 - 22Make It Reign Jun. 11, 2018
3 - 23Battles Lost And Won Jun. 18, 2018
