"Assignment: Earth" was the 55th episode of Star Trek: The Original Series, the 26th and final episode of the show's second season, first aired on 29 March 1968. The episode was written by Gene Roddenberry and Art Wallace, directed by Marc Daniels and novelized in Star Trek 3 by James Blish.



Episode charactersEdit

Beta 5 computerClifford Brent (?) • CharleyPavel ChekovCromwellJerry FreemanBill HadleyIsisJames T. KirkRoger LemliRyan LeslieRoberta LincolnLiptonLeonard McCoyJack NesvigMontgomery ScottGary SevenSpockHikaru SuluNyota Uhura

Novelization charactersEdit

IsisJames T. KirkLeonard McCoyMontgomery ScottGary SevenSpock

Starships and vehiclesEdit

USS Enterprise (Constitution-class)


811 East 68th StreetAsia minorEarthMcKinley Rocket BaseNew York CityOmicron IIISoutheast AsiaUnited States of America

Races and culturesEdit


States and organizationsEdit

Klingon EmpireUnited Federation of PlanetsAegis

Other referencesEdit

automobilecatforce shieldHydrogen bombSiamese cattelephone


Related storiesEdit

"Assignment: Earth" was originally intended to be a back door pilot episode for a spin-off TV series from Star Trek: The Original Series. The series never made it into production but Gary Seven has subsequently been featured in numerous stories in other spin-off media. Assignment: Earth finally became a series of sorts in 2008 when IDW Publishing produced a comics miniseries inspired by the original idea of a TV series: Star Trek: Assignment: Earth, detailing the adventures of Gary Seven in the late 1960s and early 1970s.

Media featuring Gary Seven
Episode Assignment: Earth
Miniseries The PeacekeeperConvergenceThe Eugenics WarsAssignment: Earth
Novels Assignment: EternityThe Rise and Fall of Khan Noonien Singh, Volume 1The Rise and Fall of Khan Noonien Singh, Volume 2
Short stories The Aliens Are Coming!Seven and SevenAssignment: OneRocket ManTime Line
Comics The PeacekeeperSplit InfinitiesFuture ImperiledBrighter Than a Thousand SunsYesterday, Today and TomorrowMy Name Is LegionWe Have Met the Enemy...Too Many PresidentsAh-Ha!



published order
Previous episode:
The Omega Glory
TOS episode produced Next episode:
Spectre of the Gun
Previous episode:
Bread and Circuses
TOS episode aired Next episode:
Spock's Brain
Previous story:
The Doomsday Machine
Star Trek 3
Next story:
Mirror, Mirror
chronological order
Previous Adventure:
The Omega Glory
Pocket Next Adventure:
Spectre of the Gun
Previous Adventure:
Visit to a Weird Planet Re-Visited
Voyages of the
USS Enterprise (NCC-1701)
(2264 to 2270)
Next Adventure:
Day of Honor: Treaty's Law

External linksEdit