The Immortal appear to be a sub species of Human which is very difficult, if not impossible, to kill. Immortals are very similar to Humans, yet cease aging at a point, and can heal from all injuries almost instantaneously.

Evidently, one cannot know if they are an Immortal until their death. (TNG novel: Greater Than the Sum)

Gary Seven was aware of the existance of Immortals prior to 1984. (TOS novel: The Rise and Fall of Khan Noonien Singh, Volume 1)

Known ImmortalsEdit

• Flint - currently believed to be dying, but was still alive in 2374.
• Morgan Primus - was killed by the Beings and transferred her consciousness to the USS Excalibur computer system.
• Tarella Lee - killed herself with Promethean weaponry.
• Malok - Left alive by Spock on Pollux II, but inhabited by Vulcan emotions.

ReferencesEdit

• TOS short story: "The Immortality Blues"
• TOS novel: Federation
• TOS episode: "Requiem for Methuselah"
• TOS novel: The Cry of the Onlies
• TOS novel: The Rise and Fall of Khan Noonien Singh, Volume 1
• NF novel: Fire on High
• NF novel: Renaissance
• NF short story: "Lefler's Logs"
• NF short story: "Alice, on the Edge of Night"
• TNG short story: "The Other Side"
• TNG novel: Immortal Coil
• NF novel: Being Human
• NF novel: Gods Above
• NF novel: Missing in Action
• NF comic: "Turnaround, Part I"
• TNG novel: Greater Than the Sum
• Star Trek: Myriad Universes novel: Seeds of Dissent