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Rigelian ambassador 2
A Rigelian ambassador, 2155
Rigelian ambassador 1
A second Rigelian ambassador, 2155
This page features the Rigelians. You may also be looking for the reptilian species known as the Rigellians.

The Rigelians were a Alpha Quadrant humanoid species who inhabited the planet Rigel V. (TOS: "Journey to Babel")


They are known to have shared a similar internal physiology with Vulcans and Romulans. These similarities, notably to Vulcans, included similar blood chemistries. Rigelians also shared a similar neurology to Vulcans and Romulans, as they too were susceptible to the neurological disease known as Tuvan Syndrome. (TOS: "Journey to Babel"; DS9: "Inter Arma Enim Silent Leges")

One of the ancestors of an unnamed Human from the 31st century was discovered by Dr. Phlox to be a Rigelian, based on the individual's nucleotide sequence in his DNA. (ENT: "Future Tense")

History and politicsEdit

Relationships with other speciesEdit

Brian J Williams, Affliction

A Rigelian "kidnapper" on Earth

During the 22nd century, Rigelians maintained relationships with several Alpha and Beta Quadrant species. By the 2150s, it was not uncommon to find a Rigelian visiting Earth.

In 2154, an Andorian and two Rigelians were attacked on Earth in a wake of xenophobia after the Xindi incident. (ENT: "Home")

Later that year, three Rigelians visiting Earth, who were working for the Klingons, attacked and kidnapped Dr. Phlox from the streets of San Francisco. They later transferred him via a Rigelian freighter to a Klingon ship. The Rigelian kidnappers and their ship were later destroyed. (ENT: "Affliction")

In early 2155, the Rigelians participated in talks discussing their wish to join as a possible member in the Coalition of Planets along with Humans, Tellarites, Andorians, Coridans, and Vulcans. (ENT: "Demons", "Terra Prime") During the negotiations, six of the Earth universal translators experienced a "glitch" and started confusing the Rigelian language with Andorian. (ENT: "Terra Prime")

Trade and commerceEdit


A 24th century Rigelian freighter

The Rigelians independently operated their own freighters during the 24th century. In 2369, one of these freighters docked at Deep Space 9 prior to its mission to the Gamma Quadrant. (DS9: "Vortex")

Medical achievementsEdit

The Rigelians were responsible for developing a unique gene therapy technique that was capable of curing medical conditions such as Taggart's Syndrome. (ENT: "Demons", "Terra Prime")

During the mid-2260s, an experimental chemical stimulant designed to speed up reproduction and replacement of blood in the bodies of certain species was developed that was successfully tested in Rigelian test subjects on Rigel V. Although the side-effects included tremendous strain on the spleen and the liver, it was later discovered by Doctor Leonard McCoy to be a viable treatment for producing Vulcan T-negative blood. (TOS: "Journey to Babel")




Background information Edit

The homeworld of the Rigelians being Rigel V has not been firmly established, but it is known from TOS: "Journey to Babel" that Rigelians were at least present on Rigel V in the mid-23rd century.

A note in the final draft script of ENT: "Affliction" described Rigelians as "an often mentioned, but never-before-identified species."


The Rigelians are a playable species for the Federation in the game Star Trek Online.

The novel Tower of Babel establishes that there were three species of Rigelians. These included:

All Rigelian species were politically united and the Rigel system was considered to be a crowded and bustling population center in the novels, with its three native species and numerous colonists from other species.

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