Returning Series – episode 3x23 aired 1 month agoseason 4 airs in 3 months
38: Crisis on Earth-X, Part 1(November 27, 2017 – 8 months 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. BR: Super girl  CN: 女超人  FR: DC's Supergirl  GR: Σούπερκορίτσι  KR: 슈퍼걸  RU: Супердевушка