Episode Title: "THE DOOMSDAY MACHINE"
Production Number: 35
Original Air Date: 10-20-67
The U.S.S. Enterprise answers a distress call from the U.S.S. Constellation in System L-370, but the crew finds all seven planets in the star system destroyed. In System L-374, planets are also destroyed, and the heavily damaged U.S.S. Constellation is adrift without power.
Aboard the abandoned Constellation, the Enterprise officers find Commodore Matt Decker alone, after he beamed his 400 crew members down to a planet in the system, which was subsequently destroyed by a huge alien device that destroys planets with a pure antiproton beam and consumes them for fuel. The Enterprise crew determines that the alien machine came from outside the Galaxy, and is heading into the most densely populated section of the Galaxy.
While Captain Kirk and Lt. Commander Scott remain aboard the Constellation to effect repairs, Dr. McCoy takes Commodore Decker back to the Enterprise. The machine attacks the Enterprise before heading for the Rigel Colony in the next star system, and Commodore Decker assumes command of the Enterprise in order to attack the machine. The Enterprise does no damage to the machine, whose hull is composed of solid neutronium. Commodore Decker is relieved of command, but he steals a shuttlecraft and attempts to destroy the alien machine from the inside.
Decker's shuttlecraft is destroyed, and its explosion causes a minor power drain inside the machine. Kirk rigs the U.S.S. Constellation's impulse engine to explode when the alien machine pulls the starship inside. Captain Kirk is beamed safely back to the Enterprise, and the atomic explosion disables the machine, rendering it inert.
Factoid: Vulcans never bluff, according to Mr. Spock.
Factoid: The overload of a starship's impulse engine will result in a fusion expolsion of 97.835 megatons.
Dr. McCoy: "I'm a doctor, not a mechanic."
Guest Characters: *Commodore Matt Decker dies, Lt. Kyle, *Lt. Palmer, Lt. Leslie
Starships: *U.S.S. Constellation NCC-1017 destroyed
KEY: [brackets]=illusions *star=first appearance