Time Lords to heal from particularly serious yet non-fatal damage without the need for regeneration. (TV: Planet of the Daleks, PROSE: Vanishing Point)
The Sixth Doctor entered a healing coma to recover from an aborted regenerative collapse. While asleep, he intended to "edit" his memory of a premature encounter with Jack Harkness, a companion from his personal future. (AUDIO: Piece of Mind)
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