Project Revenant

Project Revenant was a Time Lord project set up during the Last Great Time War. Its purpose was to resurrect the "most brilliant minds Gallifrey has ever seen" in order to win the War against the Daleks. (AUDIO: Celestial Intervention)

The first Time Lord to be resurrected was Rassilon, his matrix projection was imprinted onto the Time Lord Valerian, which killed Valerian in the process. (AUDIO: Desperate Measures)