The following is a list of unnamed illusory Starfleet personnel.

Deep Space 9 nurse

An illusory nurse

This nurse was part of an illusion created by Luther Sloan's mind in 2375 when Doctor Julian Bashir and Chief Miles O'Brien linked their minds with Sloan's. After Bashir woke up and Nurse Bandee told him that Sloan was dead, Bashir ordered this nurse to give him ten milligrams of cordrazine. (DS9: "Extreme Measures")

This nurse was played by an unknown actress.

Enterprise security guard

A security guard

This security guard was an illusion created by the Vians in 2268 on Minara II, along with illusions of Montgomery Scott and Roger Lemli to lure the landing party (James Kirk, Spock, and Leonard McCoy) and Gem into their trap. (TOS: "The Empath")

Played by an unknown actor.

Enterprise-D science officer

A science officer

This female science division officer was part of Barash's holographic illusion in 2367. She was talking to Geordi La Forge on the bridge when the two were interrupted by Captain Riker. (TNG: "Future Imperfect")

This science officer was played by an unknown actress.

Enterprise-D transporter chief

A transporter chief

This transporter chief operated the transporter aboard the USS Enterprise-D in 2383, a false future created by the alien Barash in 2367. He beamed Admiral Picard and Deanna Troi aboard from the Romulan Warbird Decius, and later, Ambassador Tomalak. (TNG: "Future Imperfect")

This transporter chief was played by George O'Hanlon, Jr..

Ferengi ensign

A Ferengi ensign

In an illusory reality created by the alien Barash in 2367, this Ferengi ensign served at the conn station on the Enterprise-D in 2383. (TNG: "Future Imperfect")

This Ferengi was played by an unknown actor.
Riker, in the illusion, comments on the unlikelihood of a Ferengi ensign, though Nog actually became an ensign just seven years later in DS9: "Favor the Bold".
The Star Trek Customizable Card Game gives his name as Prot.

Klingon crewman

A Klingon crewman

This Klingon crewman served on the Enterprise-D in an illusory 2383, created by the alien Barash on Alpha Onias III in 2367. She passed Captain Riker and Dr. Crusher when she left a turbolift. (TNG: "Future Imperfect")

This Klingon crewman was played by an unknown actress.

Starfleet admirals

Illusory Starfleet admirals

Three illusory Starfleet admirals, greeting Voyager on Earth, were seen by Neelix and the Voyager crew, when the large bioplasmic organism dubbed the "telepathic pitcher plant" manipulated their minds, making them believe the ship had arrived home via a wormhole. (VOY: "Bliss")

The admirals were played by unknown performers.

Starfleet officer at Orion colony

A Starfleet officer

A Starfleet officer encountered by Captain Pike in a Talosian illusion simulating the Orion colonies. The officer was wearing a dress jacket Starfleet uniform, colored operations division beige. This officer was quite taken by the illusory version of Vina, portrayed as an Orion slave girl. (TOS: "The Cage", "The Menagerie, Part II")

This unnamed Starfleet officer was played by actor Robert Phillips.
He was named "Loman Stocker" in the novel The Children of Kings.

Uhura's crewman

The M-113 creature in the form of a Starfleet crewman

A crewman encountered by Uhura, an image created by the M-113 creature. Upon meeting her, she asked if she knew him. He explained that she was thinking of someone like him and that he thought she looked lonely. Uhura seemed to think he was giving her a line. He then spoke Swahili to the communications officer, which surprised her. Before he could kill her, she was summoned to the bridge. (TOS: "The Man Trap")

The crewman was played by Vince Howard.
The Pocket TOS novel Across the Universe reveals that the creature appeared as Trent Ojuremi (β), a former friend of Uhura's who failed to enter Starfleet Academy.

Wounded crewmember

A badly burned crewmember

In a brainwashing scenario devised by the Tilonian Suna at the Tilonus Institute for Mental Disorders in 2369, Commander William T. Riker witnessed this badly-burned operations division ensign being brought to sickbay after a plasma torch blew up right in his hands. (TNG: "Frame of Mind")

The wounded crewmember was played by Allan Dean Moore.

Zombie crewmembers

Deceased crewmembers in the mess hall

These zombie crewmembers appeared in a telepathically influenced dream of Captain Kathryn Janeway, telling her they died because she didn't take them home, in 2374. (VOY: "Waking Moments")

They were played by unknown performers.
According to the episode's script notes, this "eerie scene" contains "four dead Voyager crewmembers sitting in chairs, their hair gray, their skin white and decaying, their bodies covered in cobwebs."
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