what is the secret of the face of boe
Face of Boe The Face of Boe's ostensible last appearance is in "Gridlock" (2007), in the year five billion and fifty-three, some time after a drug-induced plague has wiped out almost all life on New Earth. He had been using his life force to power the undercity of New New York, which was sealed off from the rest of the planet to save the only survivors from the now-extinct virus. The Face of Boe needed the Doctor's help to free the people from the undercity, and he uses the last of his life energy to provide a power boost to unseal the exits. As was foretold in legend, initially introduced in spin-off media, the sky (of the undercity) splits asunder just before the Face of Boe dies. In his final moments, the Face of Boe reveals his great secret to the Doctor: "You are not alone." The Doctor tells his companion, Martha Jones, that the Face of Boe must be mistaken, but it is later revealed that there is indeed another Time Lord â€” the Master has survived the Time War.