The Master
From Tardis Wiki, the free Doctor Who reference
The Master is a Time Lord.
The Master has used many fake names, including Roger, Peter, Geoffrey, Tony, Eric, Robert and Sam. (AUDIO: Exile)
Behind the scenes
Roger, Peter, Geoffrey, Tony, Eric, Robert and Sam all refer to the actors that played the Master, like Roger Delgado, Peter Pratt, Geoffrey Beevers, Anthony Ainley, Eric Roberts, and Sam Kisgart.
