Season 3 of Supergirl has been building Reign to become Kara’s most dangerous enemy of the series to date.
In last week’s episode, Sam’s double life began to take its toll, and she started to unravel to Alex.
Fans have known all along that Reign is the alter ego of none other than the lovable single mom Sam, but everybody else — including Sam herself — has been blissfully unaware.
As a Worldkiller of Kryptonian origin, Reign has a lot of Kara’s powers without some of her biggest weaknesses.