I continue to have serious problems with this show, but I do appreciate that they set up a premise, and they're seeing it through. It's a startling cynical view of humanity that the show is putting forth, but it does provide a crucible by which Supergirl can become a less naive but more inspiring hero. One of the innovations of this show that has unsettled me from the beginning, and especially since the jump to The CW and the backburner-ing of Kara's civilian life, is that Supergirl is a DEO asset. It felt a bit too much like Superman as Reagan's lackey in The Dark Knight Returns. Here, the president's decision to terminate her employment in order to placate his donors sympathetic to Lockwood's cause technically makes Supergirl a vigilante now, but it also frees her up to follow her own conscience. With regard to that final scene: Spoiler The various DC shows have been very contradictory about the nature of the multiverse. There have been multiple mentions of there being 52 Earths (plus Earth-X) in the past, but there have also been mentions of infinite earths. The existence of Earth-90 would seem to point to the latter conception. Can we assume based on seeing John Wesley Shipp as Barry Allen in that costume that Earth-90 is the Earth that the 1990 "Flash" series was set on?