The Changeling (Star Trek: The Original Series) The Changeling (Star Trek: The Original Series) "The Changeling" is the third episode of the of the American science fiction television series "". Written by John Meredyth Lucas and directed by Marc Daniels, it was first broadcast on September 29, 1967. The crew of the USS "Enterprise" deals with a life-destroying space probe originally launched from Earth. The plot contains similarities to the later . The "Enterprise" investigates a distress call from the Malurian star system. Upon arrival, First Officer Spock reports no life readings from any of the 4 billion inhabitants, despite otherwise normal recent communications. The ship's shields
The Doomsday Machine (Star Trek: The Original Series) The Doomsday Machine (Star Trek: The Original Series) "The Doomsday Machine" is the sixth episode of the of the American science fiction television series "". Written by Norman Spinrad and directed by Marc Daniels, it was first broadcast on October 20, 1967. In the episode, the starship "Enterprise" fights a powerful planet-killing machine from another galaxy. The Federation starship USS "Enterprise", following a trail of mysteriously destroyed star systems, picks up the automated distress beacon of another starship, the USS "Constellation". Upon arrival, the "Constellation" is found drifting in space and severely damaged; Captain Kirk, Chief Medical Officer Dr. McCoy,