Star Trek Maps, Star Trek Concordance, an entry on Startrek.com, and Star Trek Encyclopedia (3rd ed., p. 8) referred to the planet mentioned in "Wolf in the Fold" as "Alpha Proxima II". The pronunciation of this planet in the episode sounded more like "Alpha Aradoni II", which was also supported by the closed captioning. The spelling of "Alpha Eridani II" can be found in the Redjac entry on Startrek.com and in the Star Trek Encyclopedia (3rd ed., p. 403) as well as the Star Trek: Star Charts. According to the Star Trek Maps (p. 22), Alpha Proxima II was one of the first extra-solar Human colonies, with major industries in mining, farming and sea-farming. By the 23rd century, the planet had a total population of 12 million with more than 3 million living in the port city Heliopolis.