The first prototype, 46-685 continued to fly, including appearing in the film Toward the Unknown as the "Gilbert XF-120" fighter.
Tomb of the Unknown Soldier | Out of the Unknown | Challengers of the Unknown | Unknown Pleasures | The Unknown Warrior | Persons Unknown (TV series) | Persons Unknown | Domain of unknown function | XCOM: Enemy Unknown | Unknown Hinson | Tomb of the Unknown Soldier (Moscow) | The Unknown Comic | Letter from an Unknown Woman | X the Unknown | Unknown years of Jesus | Unknown to No One | Unknown Mortal Orchestra | Unknown Component | Unknown Chaplin | Toward the Unknown | The Unknown Witches of Oz | The Unknown Child (disambiguation) | The Unknown Child | The Tale of the Unknown Island | The Dream-Quest of Unknown Kadath | Omega the Unknown | Letter from an Unknown Woman (1948 film) | Capitalism: The Unknown Ideal | Campfire Songs: The Popular, Obscure and Unknown Recordings |
The lyrics possess many elements: betrayal, either political or personal ("treason"); the illusion of danger ("through a glass eye"); and fearlessness toward the unknown ("take me to the pilot of your soul").