For the Arrow episode, see Tremors (Arrow).
"Supergirl, I'm not going to kill you. I'm not a villain. You shouldn't have treated me like one."
Lena Luthor to Kara Danvers on her "betrayal"
"Tremors" is the seventh episode of the fifth season of Supergirl, and the ninety-fourth episode overall. It aired on November 17, 2019.


Supergirl finally learns the truth about Lena while tangling with Leviathan. J'onn J'onnz makes a discovery about his brother's whereabouts.[src]



Special guest star

Guest starring


  • This is the first episode not to feature Staz Nair (William Dey) after signing on as a series regular.
  • The D.E.O., more specifically Brainy, refers to Rama Khan as an "Earth-bender". This is a reference to Avatar: The Last Airbender and The Legend of Korra where one of the elemental benders is earth.
  • Arrow also has an episode titled Tremors.
  • When Kara invites Lena to the Fortress of Solitude, Lena ponders the ramifications of a Luthor's presence there. Lex has previously found his way into the Fortress in Superman Returns and the seventh-season finale of Smallville.
  • Rama Khan is responsible for the following natural disasters:
    • Noah's Flood in chapters 6–9 in the Book of Genesis, God's floods the world for 40 days and 40 nights, to rid the world of sin, saving only 2-7 of every animal plus Noah and his extended family.
    • Starting in 1233 BC Antioch was destroyed by multiple earthquakes & war. For over 1500 years, it had immense power and "the cradle of Christianity" due to its role in Judaism and early Christianity.
    • 79 AD, Pompeii of Roman was destroyed by Mount Vesuvius under 13 to 20 ft of volcanic ash.
    • 1887 The Yellow River Flood in central China killed about 900,000 people.
    • 1970 The Bhola Cyclone devastating East Pakistan & India's West Bengal. It remains the deadliest tropical cyclone ever recorded and one of the deadliest natural disasters, killing 500,000 people.


  • Barney hit the left side of his head against the cement, but the right side of his head suffered a gash.
  • Alex Danvers apologized to Kelly Olsen for not calling her after her accident, despite being unconscious the entire time, and having just woken up.
    • However, Kelly could have meant that Alex should have called before going to check on Rip Roar.
  • Myriad was inside Fort Rozz when Supergirl launched it into space at the end of Season 1. She did not retrieve it when inside Fort Rozz in Season 3, making it impossible to be inside the Fortress of Solitude.
  • Lena Luthor is implied to have never seen the Fortress of Solitude before. However, she and her mother Lillian were in the Fortress of Solitude during "Nevertheless, She Persisted", and the "L-protocol" did not go off in that episode.




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