Linda said:
Two things...
LE, what in Martyn's name is Doppelanger...?
A German word meaning 'double', tends to get used for 'Evil Twin'.
There was a reasonably crap science fiction film of the same name made in the late 1960's or early 1970's of the same title, and it postulated the existence of an 'Earth II' exactly on the opposite side of the sun - a sort-of 'opposite land' where everything looks the same at first sight (then you see the positive electrons, letters all the wrong way round, they don't pepper Steve Waugh with short balls when he first comes in to bat, Devil Ducky actually funny, that sort of thing).
Well, one thing led to another, 'they' sent a space mission to this other world only for it to fail, the guy ends up back on Earth. Only it isn't. Everything's backwards. The Doppelganger world had also sent a mission at the exact same time - only the viewer is aware of that, all the characters think the astronaut is nuts.
He ends up being a binner for some time, attempts to commit suicide by ramming a wheelchair into a mirror (because everything looks 'normal' when you look into a mirror) and so on.
In keeping with your original question, the film went down like a lead balloon because the title sounded too 'sciencey'. So they renamed it 'Journey to the Far Side of the Sun' in typical 'dumbing down for the masses' marketing fashion - and it still flopped.
Because it was crap. A marvellous idea, just done so poorly.