User:SOTO/Forum Archive/The Panopticon/@comment-9435571-20130724194223/@comment-9435571-20130731083033
From Tardis Wiki, the free Doctor Who reference
In "Mastermind", he talks about his confrontation with the Doctor "around the millennium", about his escape from the Eye of Harmony and he uses a Deathworm Morphant to jump from body to body, each one gradually decaying, until he was captured by UNIT. So this is definitely a post-TVM Master.
