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In page Doppelgänger (1969 film):
"Kanter was dissatisfied with the draft script, so Anderson hired novelist Donald James to improve the characterisation.[1] James' revisions included substantial changes to the parts of the story set on the mirror Earth, essentially causing the characters of Ross and Kane to switch roles.[4][6] In the Andersons' draft, Ross was blinded in the Dove crash while Kane survived unhurt; however, Kane's claims about a Counter-Earth led EUROSEC to declare him insane. A structural flaw in Doppelgänger caused it to burn up in the atmosphere with Kane trapped inside, and the film ended with Kane's wife, Jason Webb and the Rosses attending Kane's funeral.[6]
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