Pathfinders to Venus (1961)

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Returning from their unexpected trip to Mars the crew of MR4 intercept a distress signal from Captain Wilson, a U.S astronaut, and must change course for Venus to attempt a rescue in space. However, through the space periscope, Brown sees what appears to be a settlement or a city of some sort. Desperate to investigate, Brown edits Wilson's message and tricks the crew into landing Venus so as they can rescue him.