Unnamed humanoids (23rd century)

These are unidentified humanoids species observed in the 23rd century. (Star Trek: The Original Series, Star Trek movies)

Alien on Memory Alpha

File:Dead Alien on Memory Alpha.jpg

Dead Alien

This alien was found dead on Memory Alpha.

Aliens with big hair

File:Aliens with big hair, Journey to Babel.jpg

Ambassadors on the Enterprise

Two ambassadors of this race joined the USS Enterprise in 2268 to attend the Babel Conference. (TOS: "Journey to Babel")

Aliens with leather head-bands

Alien ambassadors.

Ambassadors from this species served on the Federation Council in 2286. (Star Trek IV: The Voyage Home)

These suede costumes, tassels and resin jewelry were featured on the Zaranites of (Star Trek: The Motion Picture).

According to a costume of one of these individuals that was auctioned off in the It's A Wrap! sale and auction, these individuals are Mazorites. [1]

Alien with netting on face

File:Alien with netting on face STVI.jpg

An alien at the Khitomer Conference.

This alien was present with another of its kind, at the Khitomer Conference. Because of this, it is probable that it came from a Federation world. (Star Trek VI: The Undiscovered Country)

Alien with pointed eyebrows

File:Alien with pointed eyebrows, TSFS.jpg

An alien crewmember

A large, bald alien with a sharp ridge above the eyes was a crewmember on the USS Enterprise. (Star Trek III: The Search for Spock)

A female alien of the same species was created for the bar scenes.

Alien with pigtails

File:Alien with pony tails, Journey to Babel.jpg

Ambassadors

Members of this species attended the Babel Conference in 2268. (TOS: "Journey to Babel")

The man wearing pigtails and the 'old woman' may be from the same species, considering that most ambassadors came in pairs.

Blue-skinned Alien

File:Unnamed purple race tuc.jpg

Male ambassador (2293)

Three members of this race were present at the Khitomer Conference in 2293, when the Federation President was almost assassinated. (Star Trek VI: The Undiscovered Country)

The Special edition DVD suggests these are "Andorians" who forgot their antennae or white hair. According to production photos, these aliens were called "Zelonites

Copper-skinned Alien

File:Copper aliens, Journey to Babel.jpg

Copper-skinned ambassadors

Diminuitive copper-skinned humanoids. Members of this species attended the Babel Conference in 2268. (TOS: "Journey to Babel")

One of the aliens was played by Billy Curtis.

An unfilmed scene in the ENT: "Terra Prime" script described these as the Ithenites.

In issue 11 of Stardate magazine, these aliens were described as the Dayen from planet Orodanga in the Eta Virginis system.

Elysian Council Member

File:Bearcat.jpg

Unknown Council Member

This alien served as an Elysian Council member on Elysia in 2269. (TAS: "The Time Trap")

The head indicates the councillor could be a Kzinti from Larry Niven's Known Space Universe.

Enterprise (Alternate Reality) Aliens

• See: Unnamed USS Enterprise (alternate reality) personnel

Female Elysian Councilor

File:Aquan-looking female in a water helmet, time trap.jpg

Female Elysian Councilor

This alien served as an Elysian Councilmember on Elysia in 2269. (TAS: "The Time Trap")

Nimbus III inhabitants

See: Nimbus III inhabitants

Purple Federation members

This race with light purple skin are prominent members of the Federation, having joined sometime prior to 2268. An Ambassador from this race attended the Babel Conference in 2268, when Coridan was admitted into the Federation. She was seen with one particular crewman escort several times at the reception. (TOS: "Journey to Babel")

At least one member of this species was seated in the Federation Council in 2286. He had the characteristic purple skin color of his species, mildly purple hair and yellow irises. (Star Trek IV: The Voyage Home)

Members of this race were present at the Khitomer Conference in 2293.(Star Trek VI: The Undiscovered Country)

Although difficult to see, background sources say these were intended to be the same purple aliens from "Journey to Babel". A close-up background shot of this character can be seen here.

Unnamed purple race jtb.jpg

Female ambassador

Purple Federation members TVH.jpg

Male ambassador (2285)

Purple Federation members TUC 2.jpg

Male ambassador (2293)

Robed aliens

File:Robed aliens, Journey to Babel.jpg

Ambassadors on the Enterprise

Ambassadors of this race joined the USS Enterprise in 2268 to attend the Babel Conference. (TOS: "Journey to Babel")

They could simply be Human, but TOS had numerous of examples of human-looking aliens. It is possible that the two robed individuals were supposed to be different races.

Rura Penthe personnel

• See Rura Penthe inhabitants

San Francisco bar aliens

• See San Francisco bar visitors

Shipyard Bar aliens

• See Unnamed Shipyard Bar visitors

Silver tube amazette alien

Three female members of the silver tube amazette aliens were present at the Camp Khitomer conference in 2293. Another member of this species served as assistant of the Federation President. These silver haired women were members of the Federation. The woman, who assisted the president is the only one who wore a grey hat. (Star Trek VI: The Undiscovered Country)

The president's assistant was played by regular TNG extra Lena Banks. The other three dignitaries were played by Roma Lee Tracy and two unknown actresses. They all received no credit for their appearance.

The describing name of the race is directly from the actress. She was shooting the scenes at the Brandeis-Bardin Institute and was chosen to portray the Federation presidents assistant. She should play his "eyes", because in an early version the president was blind and she should guide him. However, the scene with her and the president was cut from the aired film, she was only seen in the background later, but the scene was part of the theatrical trailer.

The Federation president's assistant...

...and three other members

Lena Banks on set

Roma Lee Tracy on set

Yellow-skinned Alien with horizontal nose slits

File:Yellow-skinned alien TUC.jpg

A member of the species.

Two members of this species were present during the Khitomer Conference in 2293. This species has a peculiar way of clapping hands with outstretched arms. (Star Trek VI: The Undiscovered Country)