The Enemy Within (Episode)

"The Enemy Within"

Series	Star Trek
Season	1
Episode	5
Production Number	05
Previous	Mudd's Women (TOS 04)
Next	The Man Trap (TOS 06)
Released	6 Oct 1966
Advertising	Amazon

Prime Timeline
(The root of all realities)

Stardate 1672.1: A transporter malfunction creates an evil Kirk.

In orbit of Alfa 177, the U.S.S. Enterprise NCC-1701 experiences a momentary transporter malfunction, caused by a magnetic ore accidentally brought aboard. Scotty checks the equipment, finds nothing wrong, and beams aboard Captain Kirk. After they leave the transporter room, a duplicate Kirk materializes. The malfunction has split the captain into two people, each physically identical but mentally and emotionally distinct. The "good" Kirk is compassionate, intelligent, and deliberate. The "bad" Kirk is violent, amoral, and savage.

An animal beamed aboard the Enterprise shortly thereafter is divided into two creatures as well—and after Yeoman Rand accuses the captain of assaulting her, Spock realizes the same has happened to Kirk. The transporter malfunction must be repaired shortly or a stranded landing party, led by Sulu, will freeze to death on the planet's surface.

The captain, meanwhile, is dying—neither half can survive alone. Scotty rigs the transporter to run through the impulse drive, and after capturing the "bad" Kirk, beams both captains down—and back as a single person. The restored Kirk then orders the landing party rescued.

Image Gallery

Alfa 177
Surface of Alfa 177
Geological Technician Fisher
Helmsman
Duplicate Kirk
Science Crewman
Transporter Technician Wilson
blanket
hypospray
magnetic ore
makeup
mirror
phaser
phaser heating rocks
phaser heating rocks
A towel
transporter controls
Enterprise briefing room
Alfa 177 canine
An attempted rape
Medical uniform
Sign to Yeoman Rand's quarters
Ship Captain uniform
Vulcan nerve pinch

Related Data

Astrometrics	Alfa 177
Chronology	Prime Timeline: Stardate 1672.1-1673.5; 2266
Culture	skiing
Education	doctor; doctorate; geologist; physician
Food	alcohol; coffee; rice wine; Saurian brandy
People	Farrell, John; Fisher; Helmsman; James; Kirk, James T.; McCoy, Leonard; Rand, Janice; Science Crewman; Scott, Montgomery; Spock; Sulu, Hikaru; Uhura, Nyota; Wilson
Politics	Starfleet; Starfleet Ranks (Crewman, Technician, Lieutenant, Lieutenant Commander, Commander, Captain, Technician, Yeoman); United Federation of Planets
Science & Technology	autopsy; blanket; blood; circuits; communications; communicator; companel; computer; decontamination; deflector dish; degrees; ego; frostbite; geology; id; impulse drive; magnetic ore; magnetism; mirror; phasers; psychology; rope; synchronic meter; thermal heaters; towel; tranquilizer; transporter; transporter duplicate; tricorder; turbolift; warp drive; warp nacelle
Ships & Vehicles	Constitution class; U.S.S. Enterprise NCC-1701
Xenology	Alfa 177 canines; Humans; Vulcans
Miscellaneous	bridge; engineering; makeup; rape; sickbay; Starfleet Uniforms (2266); Vulcan nerve pinch