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See Castillo for other articles with titles that contain, either by relationship or by coincidence, this character's surname.

Richard Castillo was a human male who served in Starfleet during the early 24th century.


In 2332, as a Starfleet Academy cadet, he was assigned to the USS Enterprise-C. After the death of helmsman Aine McAvennie during an attack by unknown aliens, Castillo took the helm position. (ST short story: "Hour of Fire")

Castillo remained on the Enterprise for twelve years, eventually reaching the rank of lieutenant. In 2344, while responding to a distress call from the Klingon colony of Narendra III, the Enterprise was caught in a battle with the attacking Romulans, and was sucked into a temporal vortex and deposited 22 years in the future. Intercepted by the USS Enterprise-D, he met Lieutenant Natasha Yar, and began a relationship with her. Following the death of Captain Rachel Garrett, Castillo was the last surviving senior officer. He and Yar took the Enterprise-C back into the past to defend Narendra III. (TNG episode: "Yesterday's Enterprise")

The novel Vulcan's Heart has Castillo taken captive by Romulans, and killed shortly thereafter by a Romulan commander for insolence. The short story "The Fourth Toast", however, has Castillo still alive into the 2360s.

The temporal vortex instead deposited them in an alternate 2409 wherein the Klingon Empire had conquered the Federation in the 2360s decade and was in turn conquered by the Dominion. The Enterprise was captured by the Tholian Assembly and the surviving crew enslaved. They eventually escaped with assistance from other prisoners and the Wells-class timeship USS Pastak and returned with their ship to 2344, where the ship was destroyed defending Narendra III against the Romulans. (STO mission: "Temporal Ambassador"; TNG episode: "Yesterday's Enterprise")



Commanding officers of the ships Enterprise
Enterprise (sloop-of-war) Dickenson USA flag
HMS Enterprise Carnegie Flag of the British Empire.
USS Enterprise (schooner) DecaturBurrows USA flag
USS Enterprise (CV-6) Hardison
Enterprise (OV-101) Haise
USS Enterprise (CVN-65) Roper
Enterprise (NX-01) Archer Enterprise assignment patch.
Enterprise (NX-01) (alternate timelines) ArcherT'PolTuckerLorian
USS Enterprise (NCC-1701) RasmussenAprilPikeVlasidovichKirkZarloHenshamDeckerSpock USS Enterprise assignment insignia.
USS Enterprise (NCC-1701's predecessor) (Kelvin timeline) AprilMarcus Assignment badge.
USS Enterprise (Kelvin timeline) PikeSpockKirk
USS Enterprise (NCC-1701) (other alternate realities) KirkKirkPikeThelinSpockHoffmanMitchell
USS Enterprise (NCC-1701-A) KirkSpockSulu Assignment badge.
USS Enterprise (NCC-1701-A) (alternate realities) Pike
USS Enterprise (NCC-1701-B) HarrimanGeorgeRendónSuluJohnson
USS Enterprise (NCC-1701-C) GarrettCastillo
USS Enterprise (NCC-1701-D) PicardRikerJellico Badge image.
USS Enterprise (NCC-1701-D) (alternate realities) PicardCrusherHallowayRiker
USS Enterprise (NCC-1701-E) BatesonPicardRikerData Badge image.
USS Enterprise (NCC-1701-E) (alternate realities) PicardHallowayRikerDataJellicoCrusherWorf
USS Enterprise (NCC-1701-F) Shon Badge image.
USS Enterprise (NCC-1701-F) (alternate realities) PicardRikerDataShon
USS Enterprise (NCC-1701-G) Seven of Nine
USS Enterprise (NCC-1701-J) Dax Badge image.
ISS Enterprise (NX-01) ForrestArcher Emblem of the Terran Empire.
ISS Enterprise (NCC-1701) AprilFranzPikeKirkSpockDeckerRileySaavik
ISS Enterprise (ICC-1701) (Kelvin timeline) Spock
ISS Enterprise (NCC-1701-A) Pavel Chekov
ISS Enterprise (NCC-1701-D) Jean-Luc Picard
ISS Enterprise (NCC-1701-E) Jean-Luc Picard
Free Starship Enterprise Jean-Luc Picard
ISS Enterprise (NCC-1701-F) Leeta
USS Enterprise-C personnel
Emblem of the United Federation of Planets. AlfonzoAriaAristideBat-LeviA. BatraBulastCarmonaCasadoCastilloChu-FongCohenCoronDonaldFredericksGarrettThule G'Dok Glemooral-HalakHemachandraHolmesJuniorKatieKeplerKodellLoPrestiLuttrullMcAvennieNeeNorrieParkerSinghSinghStachowSternStewartThithtaTholavTyvanVaraniVinson Seal of the Federation Starfleet.

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