- The Original Series Star Trek episode "Balance of Terror" was based almost entirely on this film
- Two endings were shot: In one, both commanders die; in the other, a third vessel rescues them. The final ending was determined by preview results. The USS Haynes was portrayed by the USS Whitehurst, captained by Walter R. Smith, who received a "technical advisor" credit and can be seen portraying the ship's chief engineer. Eva Novak can be seen in a photo as the wife of Von Stolberg.
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