What is the first season of Star Trek?

The first season of Star Trek, also known as Star Trek: The Original Series, aired on NBC from September 8, 1966, to June 2, 1967, and consisted of 29 episodes. The series follows the adventures of the crew of the USS Enterprise, a starship that explores the Milky Way Galaxy in the 23rd century. The first season introduces the main characters, including Captain James T. Kirk, First Officer Spock, Chief Medical Officer Dr. Leonard McCoy, and Chief Engineer Montgomery Scott. The season also establishes the show's signature format of self-contained episodes, often involving encounters with alien species and moral dilemmas.