They air on FOX and CW.
I watched the first episode of the Flash (which was on last night). It actually was better than I thought it would be. For people that like the darker sicker more crude humor or twisted character shows... this isnt for you. That is again, based solely on Episode 1.
Ill watch again to make sure if its worth watching.
Gotham was pretty good. I've watched a few episodes. I may be 1 or 2 behind (with an episode airing this past Monday). Bruce wayne is a mere kid and the main focus of the show is on Hotshot Police Officer Gordon (who is relatively young compared to the older Commissioner Gordon we all know). The first episode I got to see Penguin, Catwoman, Bruce, and more I cant remember lol. Obviously they are all younger versions.
Ill stick with it for a week or 2 longer to make sure its worth watching.