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- Creators (Fabrini)
- Creatures
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- Credit
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- Cregger Lor Mowlanish Dor Crixa Tel
- Crell
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- Crellis Cluster
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- Crenal
- Crenfel
- Crenq
- Crenshaw
- Crenshaw (disambiguation)
- Creole shrimp
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- Crescent Valley Retreat
- Crescent and Trefoil Developments
- Crescenzo Notarile
- Crespo
- Cretia
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- Crewman
- Creyn
- Cricket
- Crimar
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- Criminal activity report
- Crimmon
- Crimson Guard
- Criniti
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- Crisis Point
- Crisis Point 2: Paradoxus
- Crisis of Consciousness
- Crisis on Centaurus
- Crisis on Vulcan
- Crisp
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- Cristóbal Rios
- Critical Care
- Critter
- Critter starship
- Croatia
- Crockett
- Crocodile
- Crocohippus
- Croden
- Croll
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- Cromwell
- Cronal Gys
- Cronari
- Croquet
- Crosby Nebula
- Cross Cult
- Crossbow
- Crossfield (disambiguation)
- Crossfield class
- Crossfield class (32nd century)
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- Crossfire (comic)
- Crossfire (disambiguation)
- Crossfire (episode)
- Crossfire (novel)
- Crossover
- Crossover (disambiguation)
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- Crossover bridge
- Crossovers with other properties
- Crossroad
- Crossroad Blues
- Crossroads
- Crossroads at Crateris
- Crossroads of Time
- Croth
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- Crovala 173
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- Crown System Patrol
- Crown of the First Mother
- Crown prince
- Croy
- Crucial III
- Crucible
- Crucifixion
- Cruiser
- Cruller
- Crullus Prime
- Crunch-blossom
- Crusader class
- Crusades
- Crushed Bothan brain fluid
- Crusher
- Crusher 54
- Crutch
- Crux
- Crux constellation
- Cruz (disambiguation)
- Crxon
- Cry Havoc
- Cry Vengeance
- Cry Vengeance (TNG comic)
- Cry Vengeance (TOS comic)
- Cryan
- Cryblon
- Crying Plant
- Cryodagger
- Cryogenic vault
- Cryogenics
- Cryptic Studios
- Crystal
- Crystal Gbowee
- Crystal Hahn
- Crystal ball
- Crystal flower
- Crystal steel
- Crystal tingler
- Crystal tree
- Crystalline Catastrophe
- Crystalline Entity
- Crystalline Trench
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- Csillag brandy
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- Cthia
- Cu'lan T'ullhy
- Cuba
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- Cube 19721
- Cube 384
- Cube 45208
- Cube 461
- Cube 630
- Cube 632
- Cuckoo clock
- Cucula
- Cudgel
- Cuellar
- Cuellar IV
- Cuh Thug Ah
- Cuirassier class
- Cuirle
- Cul
- Culat
- Culbreath
- Culhane
- Culinary Institute of the Delta Quadrant
- Culla
- Culloden
- Culluh
- Culpidus
- Culprit
- Cult
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- Cult of Kahless
- Cult of the Pah-wraiths
- Cultuic
- Culture Clash
- Culun
- Culver City (disambiguation)
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- Cumin
- Cumulative Damage
- Cunningham (Warp Delta class)
- Cunningham (disambiguation)
- Cupcake
- Cupelli
- Cupid
- Cupid's Errant Arrow
- Cura Te Ipsum
- Curalon
- Curalon IV
- Cure All
- Cure Applied
- Cure Found
- Curfew
- Curia
- Curial dust
- Curie
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- Curie (NCC-1701-D/03)
- Curie (Starfleet 394)
- Curitiba
- Curium
- Curly
- Currie
- Curry
- Curry's Martial Arts Training
- Curry (Crewman)
- Curry Dan
- Curry class
- Cursa
- Curse of the Buccaneer
- Curt Danhauser
- Curt Swan
- Curtis
- Curtis (Captain)
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- Curtis Ballard
- Curtis Danhauser
- Curtis Wellborn
- Curzon Dax
- Curzon Dax (mirror)
- Custard
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- Customs Agent
- Cutlass
- Cutlass (carrier vessel)
- Cutler (disambiguation)
- Cutter
- Cutter termite
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- Cutting beam
- Cutting the Cord
- Cuvier's beaked whale
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- Cyclops (Nova XIII)
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- Cygnet
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- Cygnet XIV
- Cygnet XIV Prime 1
- Cygnetan
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- Cymbeline blood burn
- Cymkoe IV
- Cymon
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- Cynthia K. Deatherage
- Cynthia Landiss
- Cynur
- Cynur IV
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- Cyprus
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- Cyrano Jones (Kelvin timeline)
- Cyrano Jones Incorporated
- Cyrano de Bergerac
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- Cytoplasmic pseudo-parasite
- Cytrops 469
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- D'Artagnan
- D'Dex La'Rade
- D'Emilio
- D'Gansar River
- D'Gavama class
- D'Ghor