Star Trek: The Original Series the 23rd century bearing a crew dedicated to exploring the Milky Way Galaxy. Roddenberry noted a number of influences on his idea, some of which includes A. E. van Vogt's tales of the spaceship "Space Beagle", Eric Frank Russell's "Marathon" series of stories, and the film "Forbidden Planet" (1956). Some have also drawn parallels with the television series "Rocky Jones, Space Ranger" (1954), a space opera which included many of the elements that were integral to "Star Trek"—the organization, crew relationships, missions, part of the bridge layout, and some technology. Roddenberry also drew heavily from C. S. Forester's Horatio Hornblower
Star Trek: The Original Series Nyota Uhura (Nichelle Nichols), the first African-American woman to hold such an important role in an American television series; the captain's yeoman, Janice Rand (Grace Lee Whitney), who departed midway through the first season; and Christine Chapel (Majel Barrett), head nurse and assistant to McCoy. Walter Koenig joined the cast as Ensign Pavel Chekov in the series' second season. In February 1966, "Star Trek" was nearly cancelled by Desilu Productions, before airing the first episode. Desilu had gone from making just one half-hour show ("The Lucy Show"), to deficit financing a portion of two expensive hour-long shows, "" and "Star