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- Akaar • Leonard James Akaar • Pavel Chekov • Duur • Eleen • Grant • Hadley • Keel • James T. Kirk • Kras • Ed Leslie • Maab • Leonard McCoy • Montgomery Scott • Spock • Hikaru Sulu • Nyota Uhura • Raal (Capellan) • unnamed Klingons
- Referenced only
Starships and vehiclesEdit
Races and culturesEdit
States and organizationsEdit
- Sabbath • Harper's Weekly • robe • topaline • iron • gold • silver • wool • zakdir • phaser • communicator • sword • knife • boomerang • klugat • hawk • uniform • clothing • English • Old High Martian • Latin • Greek • fortran • calculus • Vegan language • makeen • sound bomb • bloodhound • pigeon • bow • arrow • throwing stick • starfish • ox • kligat • magnasite-nitron tablet • shale • signal booster • sympathetic vibration • teer • topaline
- In the original version of the episode the Enterprise encounters an unidentified Klingon scout ship. In the 2007 remastered version of the episode a D7 class like vessel is added in its place. The comic "Against Their Nature" establishes a smaller D7-like scout vessel in operation in this era, this scout could be of this class.
- In the novelization, the planet was Ceres rather than Capella IV.
- There were no Klingons on Capella IV in the novelization.
- The novelization states that the locals were Human decendants.
- Star Trek: Myriad Universes novel: A Less Perfect Union states that the locals were very Human-like.
- From the Depths (TOS novel)
- The Peacekeeper (TOS comic) - In this Comic, Dr. McCoy reminds Captain Kirk on the events of this Episode in order to help him with a difficult decision, which might violate the Prime Directive.
- Twilight (DS9 novel) - Admiral Akaar mentions what happened after "Friday's Child".
|TOS episode produced||Next episode:|
Who Mourns for Adonais?
Journey to Babel
|TOS episode aired||Next episode:|
The Deadly Years
|Star Trek 3||Next story:|
Invasion!: First Strike
|Voyages of the |
USS Enterprise (NCC-1701)
(2264 to 2270)
Invasion!: First Strike