Solitary confinement
Solitary confinement was when a prisoner was incarcerated on their own, often as a secondary punishment administered within the prison.
Oswald Danes was in solitary confinement for six years. (TV: Rendition)
Harlan placed the Eighth Doctor in solitary confinement after a food fight. (AUDIO: The Conscript)
On Folly, Noreen Chaplin placed the Fifth Doctor in solitary confinement twice; first for twenty days, then for six months. (AUDIO: Doing Time)
Sally apparently committed suicide in solitary confinement in Detention Centre 6. Rose Tyler was later sent to the same solitary confinement, where a Blathereen disguised as a warden attempted to kill her. (PROSE: The Monsters Inside)