Izar is the place from which Starfleet Captain Garth is considered to have hailed. He was known as "Garth of Izar" during at least the 2260s.
- Izar was most likely intended to be the Izar star system, also known as Epsilon Bootis. It is a binary star system (spectral classes K0II-III and A2V) about 200 light years away from Sol. If so, he would have either been born on or emigrated to one of the planets of that system.
- Izar could also be a planet, nation, city, or town - the episode does not permit any conclusions in that regard. However, in TOS: "Metamorphosis", Zefram Cochrane is said to be "of Alpha Centauri", which is clearly meant as a star system. Since Cochrane was born on Earth, he must have emigrated there at some point and considered it his home; Garth may have done likewise from his birthplace (which was probably not Earth, as he refers to humans as "Earth people").
- The Star Trek Star Charts suggest that the inhabited planet is Epsilon Bootis III.