"Dagger of the Mind" was the 11th episode of Star Trek: The Original Series, the 10th episode of the show's first season, first aired on 3 November 1966. The episode was written by S. Bar-David, directed by Vincent McEveety and novelized in Star Trek 1 by James Blish.

References[edit | edit source]

Characters[edit | edit source]

Episode characters[edit | edit source]

Tristan AdamsBerkeleyEliFieldsJamesKarlJames T. KirkRyan LeslieLetheLeonard McCoyHelen NoelSpockNyota UhuraSimon Van GelderVinci (?) • unnamed Humansunnamed 2260s USS Enterprise personnel (USS Enterprise personnel)

Novelization characters[edit | edit source]

Tristan AdamsJames T. KirkLetheLeonard McCoyHelen NoelSpockNyota UhuraSimon Van Gelder

Starships and vehicles[edit | edit source]

USS Enterprise (Constitution-class heavy cruiser)

Locations[edit | edit source]

Tantalus V (Tantalus system, the galaxy's Alpha or Beta Quadrants)
Referenced only 
Stockholm, Sweden (Earth)

Shipboard areas[edit | edit source]

USS Enterprise 
bridgetransporter roommedical labsickbay

Planetary locales[edit | edit source]

Tantalus V 
Tantalus colony

Races and cultures[edit | edit source]


Technology and weapons[edit | edit source]

communicatorintercomstarshipviewscreenmedical kitmedical tricordersensorstransportertricorderelectoencephalographlibrary computerneural neutralizerphaser pistol

Materials and substances[edit | edit source]


States and organizations[edit | edit source]

FederationStarfleetCentral Bureau of Penologynitrogen

Ranks and titles[edit | edit source]

assistantcaptainchief medical officercommandercommanding officercommunications officercrewmandirectordoctorengineerFederation Starfleet ranksFederation Starfleet ranks (2260s)first officerlieutenantlieutenant commanderhelmsmanmedical practitionernavigatorofficerscientistscience officerweapons officertactical officermedical officer

Other references[edit | edit source]

anatomyarmbootclothingFederation membersfive-year missiongovernmenthumanoidlanguagelifeformlogicmattermemorynation-stateorbitpantsquadrantraces and culturesrankspacestarstardateStarfleet uniformStarfleet uniform (2260s)technologytitletunicuniformuniverseweaponChristmascommunicatordelta rhythmdelta waveelectroencephalographneural neutralizerphaserradiologyschizophreniabrandyChristmasdelta wavepenal colonytranquilizing drug

Chronology[edit | edit source]

prior to 2266 
Kirk attends the Christmas party. (prior to episode/novelization)
stardate 2715.1, 2266 (2260s chronology, 2264–2270 Enterprise voyages
Enterprise travels to Tantalus.

Appendices[edit | edit source]

Related media[edit | edit source]

Tantalus surface. (Decipher RPG module: Worlds)

Adaptations[edit | edit source]

Video releases[edit | edit source]

Images[edit | edit source]

Episode images[edit | edit source]

Adaptation images[edit | edit source]

Timeline[edit | edit source]

published order
Previous episode:
What Are Little Girls Made Of?
TOS episode produced Next episode:
Previous episode:
TOS episode aired Next episode:
The Corbomite Maneuver
Previous story:
Charlie's Law
Star Trek 1
Next story:
The Unreal McCoy
chronological order
Previous Adventure:
River of Blood
Errand of Vengeance
Pocket Next Adventure:
Previous Adventure:
River of Blood
Errand of Vengeance
Voyages of the
USS Enterprise (NCC-1701)
(2264 to 2270)
Next Adventure:

External link[edit | edit source]

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