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"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 characters

Beta 5 computerClifford Brent[1]CharleyPavel ChekovCromwell (launch director)Jerry FreemanBill HadleyIsisJames T. KirkRoger LemliRyan LeslieRoberta LincolnLiptonLeonard McCoyJack NesvigMontgomery ScottGary SevenSpockHikaru SuluNyota Uhura

Novelization characters

IsisJames T. KirkLeonard McCoyMontgomery ScottGary SevenSpockUSS Enterprise computer

Starships and vehicles

USS Enterprise (Constitution-class heavy cruiser)


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

Races and cultures


States and organizations

Klingon EmpireUnited Federation of PlanetsAegis

Other references

automobilecatforce shieldHydrogen bombSiamese cattelephone


Related media

"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 2From History's ShadowElusive Salvation
Short stories "The Aliens Are Coming!" • "Seven and Seven" • "Assignment: One" • "Rocket Man" • "Time Line"
Comics "The Peacekeeper, Part One" • "The Peacekeeper, Part Two" • "Split Infinities" • "Future Imperiled" • "Brighter Than a Thousand Suns" • "Yesterday, Today and Tomorrow" • "My Name Is Legion" • "We Have Met the Enemy..." • "Too Many Presidents" • "Ah-Ha!" • "Medics" • "Hosts" • "1971/4860.2" • "An Unexpected Yesterday" • "Year Five, Issue 11" • "Year Five, Issue 12" • "Year Five, Issue 15" • "Year Five, Issue 16" • "Year Five, Issue 17" • "Year Five, Issue 21" • "Year Five, Issue 22"





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 links

  1. This character was not named in the episode but the same actor, wearing an officer's Starfleet uniform, was addressed as Brent in TOS episode: "The Naked Time". The same actor also played the character of Vinci.