"Day of the Dove" is the seventh episode of the third season of the American science fiction television series Star Trek. Written by Jerome Bixby and directed by Marvin Chomsky, it was first broadcast November 1, 1968. In the episode, an alien forces the crew of the Enterprise into a brutal conflict with the Klingons. Plot The Federation starship Enterprise responds to a distress call from a human colony, but on arrival finds no signs of any type of inhabited settlement. A landing party, including Captain Kirk and Ensign Chekov, beams down to investigate further. A few moments later, they are found and surrounded by Klingons who have transported to the surface from their own orbiting vessel. Commander Kang accuses the Enterprise crew of firing upon their vessel and demands that they surrender immediately. Suddenly, Chekov makes a move to attack the Klingons, claiming they had killed his brother. Kang's men subdue him and use an agonizer device to torture him, forcing Kirk to agree to surrender. However, upon contacting the ship and asking to be beamed up, Kirk secretly warns First Officer Spock about the Klingons. Spock uses the transporter to materialize the Enterprise crewmen first, followed by the Klingons, who are overpowered by Enterprise security personnel. Kang surrenders and he and the other Klingons, including his wife Mara, a science officer, are escorted to secure quarters on the ship. Meanwhile, a glowing entity composed of pure energy, which had initially emerged on the planet below, enters the Enterprise undetected and interfaces with its controls. The ship lurches into warp at maximum speed headed for the edge of the galaxy. With the crew panicked, the entity then traps 392 members of the Enterprise's crew belowdecks by closing bulkheads and making them impenetrable. The 38 remaining members of the crew are equal in numbers to the Klingons. With tempers high – and spurred on by the sudden materialization of swords and other antique hand weapons – they begin to fight. Spock soon detects the entity, apparently feeding off the violence. When informed by Lt. Sulu that Chekov never had a brother and is an only child, Kirk realizes that the entity is capable of implanting false memories in order to trigger aggression. Kirk and Spock try to calm the crew's escalating furor to no avail. Kirk believes that if he can get to Kang, the Klingon commander can help stop