Destination Mars

Flight to Mars was made in the hey-day of the Cold War, so perhaps it is not unreasonable that Monogram films chose not to advertise that the original story was "Aelita," by the Russian novelist Alexei Tolstoy.

Of course, the main character's name, Alita, does sort of give that away. The basic story line and character line up were retained, with the exception of the professional revolutionary who got dropped. In the book the reporter appears at the beginning and end of the narrative, and does not accompany the characters to Mars. In the book the engineer was married, not afianced. Of course, the Russians also filmed Aelita as a silent. What is interesting is that the American version is more faithful to the original plot.