Corrected entry: The scientists, having carefully charted their course to Earth, state that it is an 11 million mile trip from their planet. Not likely. Mars is our nearest planetary neighbor, and it's over 34 million miles away at its closest orbital approach. There are no planets any nearer to Earth than Mars. This is one of the very few cases where Rod Serling simply failed to do his astronomy homework. (00:12:30)
Corrected entry: About 3/4 of the way through the show, Ben takes the dog tags from two soldiers as proof they are ready to give up. The problem with this is the US Army didn't start using them until late 1906, and Bonanza is set in the 1860s.
Correction: In 1906, the circular aluminum disc was introduced for use by the U.S. Army (and then made mandatory in 1913.) However, at the time of the Civil War, soldiers in the Army would carry various forms of identification. However, Cartwright never calls them "dog tags", he says "name tags." And you can see they are made of paper, not engraved metal, to fit the time period.
Correction: The whole point is that a planet used to be 11 million miles away. They blew themselves up, planet and all.