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Una Chin-Riley (often referred to as Number One) was a Starfleet officer on active duty in the 23rd century. (Star Trek: Early Voyages comics; TOS: "The Menagerie, Part I", "The Menagerie, Part II", DIS: "An Obol for Charon", "Such Sweet Sorrow", "Such Sweet Sorrow, Part 2", Short Treks: "Q&A", Star Trek: Strange New Worlds)

In the novels Captain to Captain and Desperate Hours, she is referred to as Una. This name would later be used in "Such Sweet Sorrow, Part 2" and "Q&A". In Star Trek: Strange New Worlds, her full name is revealed to be Una Chin-Riley.

Early life[]

Chin-Riley was born c. 2214 on an Illyrian colony world, though this was a closely-guarded secret as Federation law proscribed contact with members of that species. (Star Trek: Strange New Worlds: "Ghosts of Illyria", "Ad Astra Per Aspera")

In the Star Trek: The Original Series novels Vulcan's Glory and The Children of Kings, her birthworld was specified as Illyria IV. She was said to have been awarded the honorific Number One as the best intellect of her birth year. Number One was described as having been raised in "the Illyrian colonies" in the novel The Enterprise War.

Starfleet career[]

In 2251 she transferred with Christopher Pike to the USS Enterprise and served as his first officer. He addressed her as Number One in this capacity, reviving a traditional nickname used by captains in the maritime navies of Earth for their executive officers. (TOS: "The Menagerie, Part I", "The Menagerie, Part II", DIS: "An Obol for Charon", Short Treks: "Q&A")

When Pike relinquished command of the Enterprise to James Kirk, Number One was assigned a command of her own. (TOS novel Enterprise: The First Adventure)

After her long tenure on the Enterprise, Una became the commanding officer of the USS Yorktown. (TOS novels: Captain to Captain, The Captain's Oath)

Alternate continuities[]

Star Trek: Early Voyages comics[]

As a young officer in Starfleet, she went by the surname Robbins. Pike is interrupted while saying her first name, which starts with "Eure--" (Star Trek: Early Voyages comics)

Perhaps because being called Number One when NOT first officer would be confusing.

New Frontier novels[]

In the 24th century, a human immortal called Morgan Primus may be the same person as Number One.

In the New Frontier novels, Peter David plays with Primus's physical resemblance to Lwaxana Troi, Christine Chapel, Number One, and even the computer's voice -- all characters played by Majel Barrett. He has since stated that Primus is not the same person as Chapel.

It was revealed during the Talos IV mission that she also harbored an attraction for Pike. She eventually married José Tyler. If she is indeed Morgan Primus, she has a single daughter, Robin Lefler.

Fan continuities[]

Expanding the Oecumene[]

Number One was Pike's second officer on Enterprise, and a lieutenant commander, before she was his exec. They had only met three weeks before the events of this story.

Orion Press[]

Number One was said to be from Betazed, and telepathic, in this continuity.

In 2264, Number One received transfer orders to serve as science officer on the Potemkin. While thwarting the plans of the vampiric alien Akia to take over Enterprise, however, she was killed aboard the shuttlecraft Agamemnon. (Orion Press: Drink Deeply)

Paradigm Shift[]

Number One was offered command of the USS Lexington in 2261, which she turned down. Three years later, she also turned down command of the USS Antares. When Pike is promoted to fleet captain, she was offered -- and accepted -- command of the Yorktown.

When the incident that cripples Pike occurred in 2266, she and Yorktown were on patrol in the Neutral Zone, but received a communiqué from Commodore Mendez. While Number One traveled to Starbase 11 as quickly as possible, Pike had left orders that no one -- not her, not Philip Boyce, not Robert nor Sarah April -- would be allowed to see him.

Over the next few years, Number One and Dr. Boyce got together once a year to talk about Pike and reminisce. It was not until 2270, after the end of Kirk's five-year mission, that Spock told them what the Talosians did for Pike. (Paradigm Shift: "No Small Dreams")

Star Trek: Phase II[]

Number One conveyed Cadet James T. Kirk from the transport vessel Bishop to the Enterprise for an important mission involving the young Kirk's father. (Origins: The Protracted Man)

Officers of the starships Enterprise
CO XO CMO SCI ENG TAC SEC HELM NAV COMM
NCC-1701:
USS Enterprise Command Insignia
USS Enterprise Command Pin
Starfleet Flag Officer Pin
April
Pike
Kirk
Decker
Spock
Pike | Chin-Riley | Spock | Decker | Sulu April
Boyce
M'Benga
Piper
McCoy
Chapel
Lucero
Spock
Chekov
Kyle
Sonak
Decker
Saavik
Louvier
Hemmer
Pelia
Scott
DeSalle
Cleary
Noonien-Singh
Sulu
Chekov
Noonien-Singh
Giotto
Freeman
Chekov
Chin-Riley
Mann
Ortegas
G. Mitchell
H. Sulu
Leslie
Hadley
Kyle
DePaul
Hansen
Spinelli
Walking Bear
Tyler | Amin
J. Mitchell
Kelso
Alden | Bailey
Farrell | Hadley | Riley
Stiles | Latimer | DeSalle
Osborne | Painter
Chekov | Leslie | Haines
Arex | Ilia | DiFalco
Saavik
Garison
Nicola
Christina
Shankar
Alden
Uhura
Farrell
Hadley
Palmer
Martine
M'Ress
NX-01 | NX-01 (mirror) | NCC-1701 | NCC-1701 (alt) | NCC-1701 (mirror) | NCC-1701-A | NCC-1701-B | NCC-1701-C | NCC-1701-D | NCC-1701-E | NCC-1701-F | NCC-1701-G

Background information[]

  • She was portrayed by Rebecca Romijn on Star Trek: Discovery, Short Treks, and Star Trek: Strange New Worlds

External links[]

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