Introduction (blurb)Edit

Time in the galaxy has stopped running in its normal course. That can mean only one thing - the Guardian of Forever is malfunctioning. To save the universe, Starfleet Command reunites three of its most legendary figures - Admiral James T. Kirk, Spock of Vulcan, and Dr. Leonard McCoy - and sends them on a desperate mission to contact the Guardian, a journey that ultimately takes them 5,000 years into the past. They must find Spock's son Zar once again - and bring him back to their time to telepathically communicate with the Guardian.

But Zar is enmeshed in troubles of his own, and soon Kirk, Spock, and McCoy find themselves in a desperate struggle to save both their world - and his!




Max ArrunjaBeranardi al AurigaCletasD'berahanRorgan Death-HandMartha HardestyHeldeonIngevJames KirkLyllaMadonLeonard McCoyHarry MorrowDahai Iohor NarahtReydels'ByshMontgomery ScottSnnanagfashtalliSpockHikaru SuluThastenNyota UhuraUrgh'keshtVobaLisa WashingtonWynnZar
Referenced only 
Alexander the GreatAlynAraenArexAshmaraArtosAtozLudwig van BeethovenJulius CaesarChristine ChapelPavel ChekovClarysTrebor DamasCharles DickensT. S. EliotGeronimoAmanda GraysonHomerCarmen IkeyaGenghis KhanGeorge Samuel Kirk, Jr.Peter KirkWinona KirkLaolLelinosCarol MarcusDavid MarcusMatricMaybriJoanna McCoyJocelyn McCoyMiramaneeGary MitchellHarcourt Fenton MuddNahralGeorge Pattonsa'GliszppkkSarekGary SevenSpock (mirror)Che'srik TalTekolinDylan ThomasT'KyraT'NiraT'PauVoltagWeinbergerYarlevZarabethZaylenz

Starships and vehiclesEdit

USS CochiseUSS EnterpriseKismet
Referenced only 
USS Constellation IIUSS El NathUSS ReliantV'Ger


Stars: Alpha Centauri B
Planets: EarthGatewayKentSarpeidon
Cities/Other: Moorgate PlainNew AraenPacific OceanRiverside, IowaSan Francisco
Referenced only 
Stars: AchernarAlpha Centauri ABeta NiobeCanopusProxima CentauriSol
Planets: Bellatrix VCentaurusDenevaEcatholosLangMercuryOlsonPerryPlutoRumon Alpha IIISerenityVulcan
Cities/Other: Big SnowyFarragut RiverGarrovick ValleyLakreo ValleyRedbank

Races and culturesEdit

Referenced only 
EcatholanHortaPreserversRigellianRomulanSargon's PeopleTalosianTribble

States and organizationsEdit

AsyriClan KerrenDanreg FordStarfleetUnited Federation of Planets
Referenced only 
Romulan Empire

Other referencesEdit

A Christmas CaroldoppelgangerExcaliburgalactic barrierGiant Rat of TamurasGuardian of ForeverHephaestus feverKing LearKolinahrMirror Universe


  • In 1999, this novel was reprinted as the second book in The Yesterday Saga duology along with Yesterday's Son.
  • Spock makes reference to "The incident with the Giant Rat of Tamuras." This is a reference to the untold Sherlock Holmes tale "The Giant Rat of Sumatra"[1]

Related StoriesEdit




published order
Previous novel:
The IDIC Epidemic
TOS numbered novels Next novel:
Previous novel:
Yesterday's Son
Novels by:
A.C. Crispin
Next novel:
The Eyes of the Beholders
chronological order
Previous Adventure:
Strangers from the Sky
Pocket Next Adventure:
The Lives of Dax
Previous Adventure:
Strangers from the Sky
The Continuing
Voyages of the
USS Enterprise (NCC-1701)
Next Adventure:
The Last Tribble
The above chronology placements are based on the primary placement in 2285.
The Pocket Books Timeline places events from this story in one other timeframe:
Previous Adventure:
Yesterday's Son
Chapters 5 & 6
2683 BC
Prologue, Chapters 5-10 & 14-15
Next Adventure:
The Beginning