"Catspaw" is the seventh episode of the second season of the American science fiction television series Star Trek Written by Robert Bloch and directed by Joseph Pevney, it was first broadcast October 27, 1967. The crew of the Enterprise encounter two aliens from another galaxy with magical-seeming powers. This episode was the first filmed to include series regular Pavel Chekov (Walter Koenig), although it was broadcast after several other episodes with the character had already been aired; the airing was delayed to coincide with Halloween. Plot The USS Enterprise, under the command of Captain Kirk, orbits the apparently lifeless planet Pyris VII. Contact has been lost with the landing party, consisting of Chief Engineer Scott, Lt. Sulu, and Crewman Jackson. Jackson calls for transport back to the ship, but falls from the platform dead. His open mouth emits an eerie voice, telling Captain Kirk that Enterprise is cursed and must leave the planet immediately, or death will follow. Kirk beams down with First Officer Spock and Chief Medical Officer Dr. McCoy to search for the missing crewmen, leaving Assistant Chief Engineer DeSalle in charge of Enterprise. The landing party comes upon three apparitions that appear as witches, who warn the landing team not to proceed any further. The team ignores the warnings and discovers what appears to be a medieval castle. Entering the castle, the landing party comes upon a black cat wearing a diamond pendant. As they follow the cat, the floor collapses, and the fall knocks them unconscious. When they awaken, they find themselves held in a dungeon. Scott and Sulu soon appear, walking as if in a trance, and unlock their restraints. Kirk and the others attempt to overpower them but suddenly find themselves in another part of the castle, with a robed man, Korob, and the black cat, whom he appears to consult for advice. Spock remarks that no life is known to exist on the planet, and Korob admits that he is not a native. The cat leaves the room, and Korob's beautiful colleague Sylvia enters, wearing a pendant identical to the cat's. As a demonstration of her power, by which she claims to have killed Jackson, Sylvia dangles a miniature model of Enterprise over a lit candle, after which the crew of the real Enterprise reports a rapid rise in hull temperature. Kirk reluctantly surrenders and offers to cooperate. Korob then surrounds the model