Well, Sliders most definitely borrowed a few things from Philip K. Dick's novel (Soviet occupied America anyone? With Lenin statue and all that). Sliders first few season was actually pretty good. So it's not the worst comparison. But there is very little actual sliding in this show. Two people actually did it, and we don't even know how, yet. Season 3 will be focused on trying to build a sliding machine, no way to tell if they will actually succeed or not.Hmm. That trailer actually disappoints me a bit, that was a great alternate history show, and it seems to be becoming a sort of Sliders with Nazis.
Also, The Man In The High Castle has already been renewed for Season 4. Where is STD announcement that it has been renewed for season 3?