 CONT: The sound of The Keepers voice constantly changes. This is  because the video was put together from footage used in "The  Menagerie" using Vic Perrins voice, and rediscovered footage with  Malachi Thrones voice. Vic Perrin was used to dub the keeper in  "The Menagerie" because Malachi Throne appeared in the episode in  person as Commodore Mendez. Originally, the whole pilot episode used  Malachi Thrones voice for the keeper.