Board Thread:The Panopticon/@comment-9435571-20130724194223/@comment-9435571-20130731083033

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.