Very excellent film. The choice of black and white to shoot the film was a very good idea. So was the casting of the 2 brothers. I believe they are chosen to look completely different (although in the narrative they are supposed to look identical) is that the director/writer wanted to show how different their personalities are. Perhaps this could not have been conveyed so easily if 2 actual twins were cast. The dreams with the metaphorical flashback triggers were very clver, i.e. needles in the arm/Needles the town. They don't make films this thrilling anymore unfortunately. Hitchcock couldn't have done this any better.
Anyway, this was an excellent film, check it out.
Anyway, this was an excellent film, check it out.