Returning Series – episode 3x9 aired 1 week ago, episode 3x10 airs in 1 month
38: Crisis on Earth-X, Part 1(November 27, 2017 – 2 weeks ago)
Rather than wallow in self-pity, Kara and Alex go to Barry Allen and Iris West's wedding... only to find the ceremony interrupted by Nazi soldiers and villains from Earth-X including a mysteriously strong superpowered female warrior.

A.K.A. FR: DC's Supergirl  GR: Σούπερκορίτσι  RU: Супердевушка