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The Mark of Gideon

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The Mark of Gideon
Series: The Original Series
Written by: George F. Slavin and Stanley Adams
Directed by: Jud Taylor
Novelization in: Star Trek 6 by James Blish
Production information
Episode no.: 3x17
Production no.: 6149-72
First aired: 17 January 1969
Date: 2268
Stardate: 5423.4

"The Mark of Gideon" was the 72nd episode of Star Trek: The Original Series.


Captain's log, stardate 5423.4. 
We are orbiting the planet Gideon, which is still not a member of the United Federation of Planets. The treaty negotiations have been difficult because Gideon has consistently refused the presence of a delegation from the Federation on its soil, or any surveillance by the ship's sensors. They have finally agreed to a delegation of one. They insisted it be the captain of the Enterprise. I am, therefore, beaming down at once.
Log entry by James T. Kirk 
I am alone on the Enterprise. I have searched every area of the ship and still cannot find a trace of the crew, or an indication of how its disappearance was managed. The one thing that is obvious is that I suffered a memory lapse, during which time I bruised my arm. It is causing me some irritation.
Ship's log, stardate 5423.8. 
First Officer Spock reporting. Obviously the Gideons have transported Captain Kirk onto this replica of the Enterprise to so confuse his mind as to make him susceptible to some extraordinary experiment. It is my intention to locate the captain and warn him before the experiment reaches its conclusion, which logic indicates means the end of the captain's life as he knows it.



Clifford BrentPavel ChekovFitzgerald (Admiral)HodinJames T. KirkKrodakLeonard McCoyOdanaMontgomery ScottSpockHikaru SuluNyota Uhuraunnamed Gideonsunnamed USS Enterprise (NCC-1701) personnel

Starships and vehiclesEdit

USS Enterprise (Constitution-class heavy cruiser)


Gideon (Gideon system, Dorado constellation, the galaxy's Beta Quadrant)

Shipboard areasEdit

USS Enterprise 
bridgetransporter room

Planetary localesEdit

replica of USS Enterprise (bridgecorridorengineeringobservation deckquarters, captain's • sickbaytransporter room) • Gideon Council Chamber

Races and culturesEdit


Technology and weaponsEdit

communicatorintercommedical kitmedical tricordersensorsstarshipviewscreentransportertricorderviewing port

Materials and substancesEdit


States and organizationsEdit

Bureau of Planetary TreatiesFederationStarfleetStarfleet CommandGideon Council

Ranks and titlesEdit

admiralassistantbureaucratcaptainchief engineerchief medical officercommandercommanding officercommunications officerdiplomatdoctorengineerExcellencyFederation Starfleet ranksFederation Starfleet ranks (2260s)first officerlieutenantlieutenant commanderhelmsmanmedical practitionernavigatorofficerprime ministerrepairmanrepresentativescientistscience officersecond officerweapons officertactical officer

Other referencesEdit

anatomyarmatmosphereauditoriumbacteriabeamingbirthrateBonesbruisecaptain's logcaptain's log, USS Enterprise, 2268capital cityclothingcoordinatesdiplomacydiseaseFederation membersfetusfeverfive-year missiongermGideon Council Chambersgovernmenthomeworldhumanoidlanguagelife spanlifeformlog entrylogicmattermemorymicrobemicroorganismnation-stateorbitparadiseplanetphysio-cultural reportpopulationquadrantraces and culturesrankred priorityship's logship's log, USS Enterprisespacestarstar systemstardateStarfleet uniformStarfleet uniform (2260s)sterilesynchronous orbitsuicidetechnologytitletreatyuniformuniverseVegan choriomeningitisvirusVulcan neck pinchweapon


years prior to 2268 
Kirk contracts Vegan choriomeningitis. (prior to episode/novelization)
stardate 5423.4, 2268 (2260s chronology, 2264–2270 Enterprise voyages
Enterprise travels to Gideon.
Kirk recalls the Gideon trick. (TOS novel: The Rings of Time)


Related storiesEdit



published order
Previous episode:
Whom Gods Destroy
TOS episode produced Next episode:
The Lights of Zetar
Previous episode:
Let That Be Your Last Battlefield
TOS episode aired Next episode:
That Which Survives
Previous story:
The Cloud Minders
Star Trek 6
Next story:
last story
until Star Trek 7
chronological order
Previous Adventure:
The Shoulders of Giants
Pocket Next Adventure:
The Lights of Zetar
Previous Adventure:
Whom Gods Destroy
Voyages of the
USS Enterprise (NCC-1701)
(2264 to 2270)
Next Adventure:
The Lights of Zetar

External linksEdit

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