Back at the DEO, Patricia dies after making Kara promise to tell Ruby that her grandmother loves her. Reign wounds Patricia and J'onn and Kara barely gets them away. They ambush Reign when she arrives, but they don't realize that she now has the powers of Pestilence and Purity along with her own. They discover that Sam had been drawing the Reign symbols since she was a kid and Patricia feels like she failed Sam and want to try and help. Alex heads out to Lex Luthor's mansion to protect Ruby while J'onn and Kara go to Patricia's. They also figure out that Patricia Arias ( Betty Buckley) might be Reign's next stop. J'onn meets them at the hotel and Lena explains that she has Ruby in a safe place and that electricity can hurt Reign. The goodbye is cut short with news of Reign attacking Lena, Supergirl and Alex head there while the Legion take off. Winn comments about J'onn missing saying goodbye, but Mon-El says not to worry, he'll see them in a 1,000 years indicating that the Martian Manhunter will still be alive then. Brany gives Winn some future Earth dirt and they bro-hug in a very geeky but funny moment. Mon-El ( Chris Wood) looks hesitant, but they say their goodbyes to Kara ( Melissa Benoist), Alex ( Chyler Leigh) and Winn ( Jeremy Jordan).
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Brainiac-5 ( Jesse Rath) says they're all cured now, that the threat to the future is passed but they need to get home because Imra needs to make sure the alliance with Titan remains without the threat of Blight. Imra ( Amy Jackson) explains that the other status chambers are filled with Legion members who came down with the blight, hence them not waking them to help fight.
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Meanwhile at the DEO, the Legion prepare to go home. Switch to J'onn ( David Harewood) and M'yrnn ( Carl Lumbly) as J'onn is getting ready for work by M'yrnn is having some issues with his memories and doesn't want to do his exercises for it.
THE FLASH SEASON 3 EPISODE 18 FULL
James pulls up his shield to defend them while Lena gets a spray bottle full of the Kryptonite she makes and hits Reign with it, sending her off. As they talk about trust and being together, Reign ( Odette Annable) busts into the room through the window, demanding to know where Ruby ( Emma Tremblay) is. The episode starts with James ( Mehcad Brooks) and Lena ( Katie McGrath) sharing a morning sunrise after spending the night in her hotel room at the Baldwin.
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Photo: Bettina Strauss/The CW - © 2018 The CW Network, LLC.