Episode Title: "WOLF IN THE FOLD"
Production Number: 36
Original Air Date: 12-22-67
Stardates: 3614.9, 3615.4
After a woman causes an explosion on the U.S.S. Enterprise that throws Lt. Commander Scott against a bulkhead, Dr. McCoy prescribes therapeutic shore leave for Scott, to allow him to recover psychologically. On the peaceful planet Argelius Two, Lt. Commander Scott escorts Kara, a female Argelian dancer, home after meeting her in a nightclub. But the woman is soon found dead, with Scott standing nearby holding a knife, claiming to have no memory of what happened.
Lt. Karen Tracy beams down from the Enterprise to scan Scott with a psycho-tricorder, but she is soon found stabbed to death, with Scott unconscious nearby.
Before the Great Awakening 200 years ago, the Argelians used empathic contact to determine the truth. Sybo, the wife of Argelian Prefect Jaris, is descended from the ancient priestesses and has the ancestral gift. She can receive impressions from inanimate objects and sense thoughts in those nearby. During a ritual, Sybo senses an evil presence with the names Boratis, Kesla, and Redjak, but the lights go out and she is stabbed to death, with Lt. Commander Scott nearby.
Captain Kirk convinces Argelian Prefect Jaris and Mr. Hengist, a Rigelian investigator, to continue their investigation of Lt. Commander Scott aboard the Enterprise, where the computers can determine whether he is suppressing memories of killing the women.
The computer determines that Scott is not lying, and has no memories of killing anyone. The Enterprise computer also has a record that Redjak was a nickname on Earth for Jack the Ripper, who murdered women in the Nineteenth Century. Other sites of unsolved murders include Shanghai, China, in 1932, where seven women were knifed to death; 1974 in Kiev, U.S.S.R., where five women were knifed to death; 2105 in the Martian Colonies, where eight women were knifed to death; 2156 in Heliopolis, Alpha Eridani Two, where ten women were knifed to death.
The Enterprise crew speculates that the murders could have been committed by an energy creature that feeds on fear.
The computer also determines that Kesla was the name given to an unidentified murderer of women on Deneb Two, and Boratis was the name given to an unidentified mass murderer of women one year ago on Rigel Four, where Mr. Hengist comes from. The analysis of the knife used in the recent murders, with a boridium blade and murinite handle, shows that it was produced by the hill people of the Argus River region on Rigel Four.
Revealed as the killer, Mr. Hengist's body dies, and the evil Redjak spirit takes over the Enterprise computer systems. Commander Spock tasks the computer with solving an unsolvable equation: computing pi to the last digit, which consumes all of the computer's energy, forcing Redjak to return to Hengist's body. After sedating Hengist, the crew beams his body into deep space on wide dispersion.
Factoid: The ancient Argelian penalty for murder was death by slow torture, and the law has never been changed.
Factoid: The Starfleet space port on Argelius Two is the only one in the quadrant.
Factoid: Lt. Commander Montgomery Scott's serial number is SE19754T.
Factoid: The Drella of Alpha Carinae Five derived nourishment from the emotion of love.
Factoid: Captain Kirk has seen Mellitus, a cloud creature of Alpha Majoris One. In its natural state it is gaseous, and solid when it is at rest.
Factoid: There are nearly 440 humans aboard the U.S.S. Enterprise.
Dr. McCoy: "She's dead, Jim."
Dr. McCoy: "She's dead, Jim ... just like the other one."
Dr. McCoy: "He's dead, Jim."
Guest Characters: Lt. Kyle, *'Jack the Ripper' dies
Alien Races: *Argelians, Rigelian
KEY: [brackets]=illusions *star=first appearance