Screen Rant

Kara Zor-El was the Silver Age’s Supergirl… 1 / 8

Except in one reality where she wasn’t! 2 / 8

During the modern era, a human named Linda Danvers merged with an entity to become a new Supergirl… 3 / 8

But later met the Silver Age Supergirl who had accidentally been knocked out of her time and arrived in the modern era instead of the Silver Age! 4 / 8

When Kara learned she would die if she went back to the Silver Age… 5 / 8

Linda took her place and ended up becoming the Silver Age’s Supergirl… 6 / 8

And even married Superman! 7 / 8

However, all of this was erased when Linda was forced to return Kara back to her proper time, erasing everything she had done! 8 / 8