- 'Til Death Do Us Part (episode)
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- 18th century
- 1950s
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- 1970s
- 1980
- 1990s
- 19th century
- 1st century
- 2000s
- 2010s
- 2020 (production)
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- 2021 (production)
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- 20th century
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- 23rd century
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- 24th century
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- 25th century
- 2600s
- 2620s
- 2670s
- 26th century
- 27th century
- 353-IIIB
- 3rd Generation Bio-neural circuitry
- 4HE High-Fusion Reactor
- 4 January
- 51 Pegasi Facility
- A
- A-type Stars
- ACB
- AF-42 celestial tactical fighter
- AF Gordhak
- AKS Parog
- AV-X science exploratory drone
- A New Mission
- A New Officer
- A New Ship
- A Strange New Galaxy
- A Trip Down Memory Lane
- Aaamazzarite (species)
- Aaron Brown
- Aaron J. Zuniga
- Aaron K. Adams
- Aaron Thane
- Abbott
- Abby Jefferson
- Abdaria
- Abdarian
- Aberdeen
- Abigail Johnson
- Abjack Silour
- Ablative armor
- Abraham Carrillo
- Abraham Wentz characters
- Abrahamism
- Abram Nomax
- Abraxis Base
- Abraxis Command
- Abraxis IV
- Abraxis System
- Acar
- Accelerated Critical Neural Pathway Formation
- Accusations
- Achilles class
- Acobun Drod
- Act Five/Secret kept
- Act Four/Searching for Voyager
- Act One/Meeting First Officer
- Act Three/Bloodlust
- Act Two/Encountering Romulans
- Acting captain
- Ad Atrium Maius
- Adam
- Adam Bailey
- Adam Brown
- Adam Mitchell
- Adam Repsey
- Adam Rodriguez
- Adam Williams
- Adam Wolfe
- Adams
- Adaptivity Shielding
- Adlo
- Admiral
- Admiral's Yacht
- Admiral Givens
- Admiral Nyota Uhura
- Adolf Hitler
- Adolf Hitler (mirror)
- Adrian Beasley
- Adrian Kemp
- Adrian Olaes
- Adriana Watley
- Adrienne Meagan Ricardez
- Advanced Worlds
- Adventure
- Aelahl class
- Aerie class
- Aero class
- Afilox I
- Africa
- Ahab (NCC-97180/02)
- Aide-de-camp
- Aiden Rodriguez
- Airponics bay
- Aizur
- Akatorian Empire
- Akeyln Solara
- Akio Chen
- Akira class
- Akolo Tare (Sovereign)
- Al-tari Resistance group
- Al Rigil
- Alabama
- Alain J. Allard
- Alan Fletcher
- Alan Krause
- Alan P. Miller
- Alan Spears
- Alan White
- Alarat
- Alaska
- Alaxim Boreas
- Albert Carney
- Albert Patton
- Aleksandr Katinov
- Alex Thacker
- Alex Volichenko
- Alex Volichenko (Dystopian Future)
- Alexa Mulhall
- Alexa Rozhenko
- Alexander Avery
- Alexander Biennerman (TNG)
- Alexander H. Ibarra
- Alexander Merriell
- Alexander Ronson (23rd century)
- Alexander Ronson (TNG)
- Alexander Sato
- Alexander Taylor
- Alexandra Cooper
- Alexandra Laren
- Alexandria Dalton
- Alexandria II class
- Alfa-Cen Station
- Alfred Hendrickson
- Alfred Warnock
- Alice
- Alice Goureye
- Alice Herrera
- Alice Johnsson
- Alice Lawdoser
- Alice Lindsey
- Alice Wentare
- Alice Wong
- Alicia Rookwood
- Alicia Rookwood (Warship VOY)
- Alicia Williamson
- Alison Lyons
- Alissa Freigorsson
- Alithion torpedo
- Alixun
- Aliza Delmont
- Allan Hood
- Allan Hughes
- Allena Korona
- Alliance Diplomatic Council
- Alliance of Gamma Quadrant Planets
- Alnar Authoritarian State
- Alnar Matter/Antimatter Rifle
- Alorean
- Alorean Oligarchy
- Alpha Centauran
- Alpha Centauri
- Alpha Centauri VII
- Alpha Quadrant
- Alpha Quadrant Alliance
- Alpha radiation
- Altair class
- Altair class starships
- Altamid IV
- Alterius Sexus universe
- Alternate Timeline
- Alternate Universe
- Alternate mirror universe
- Alternate reality drive
- Alva Haftsburg
- Alva Stromone
- Alynna Nechayev
- Alyson Stoner
- Alžbeta Nedvedová
- Amanda Grayson
- Amanda Moores
- Amanda Nelson
- Ambassador
- Ambassador (disambiguation)
- Ambassador III class
- Ambassador class
- Ambassador class (mirror)
- Ambassador class starships
- Ambjørn Filipsen
- Ambush
- Amelia Avery
- Amelia Avery (mirror)
- Amelia McKinney
- American-Soviet War I
- Amira
- Amira Smith
- Amnell Kree
- Amy Carson
- Amy Duarte
- Amy Green
- Anastasia Dee Dualla
- Anastassia Folonova
- Anaura
- Anderson
- Andoria
- Andorian
- Andre Short
- Andrea (Warship VOY)
- Andrea Avery
- Andrea Carson
- Andrea Shannon
- Andrew Philip Simmons
- Andrew Richardson
- Andrew Thomas
- Andrew Wellington
- Andrews
- Android
- Andromeda Galaxy
- André Sogliuzzo
- Andy Berman
- Andy Blackburn
- Aneesa Kessler
- Angel Brackett
- Angela Stokes
- Angelica Nixon
- Anian War
- Anika Hopkins
- Anio I
- Anmuk
- Ann Scotters
- Anna Honoron
- Anna Odds
- Anna Rosenberry
- Annabelle Shields
- Anne Cambridge
- Anne Dorkat
- Anne Hargonsaw
- Anne Rosen
- Anneliese Bordal
- Annette
- Annie Cooper
- Annika Hansen (mirror)
- Anoeza Watkins
- Antathon Dilevu
- Anthon Balnas
- Anthony Burgess
- Anthony Call
- Anthony Cavalero
- Anthony Hopkins
- Anthony Kavanagh
- Anthony Middleton
- Antimatter Pulse
- Antimatter Torpedo
- Anton Blackford
- Anton Schaefer
- Antonio Sosa
- Anuva Base
- Anuva Command
- Anuva III
- Anuva System
- Aokian
- Aperan Pos
- Aphrodite
- Aquarius class
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