Epsilon Delta, having become bored and feeling his intellect being wasted on Gallifrey, stole a Type 102 TARDIS and escaped to Earth. There, he faked credentials to become the President of St Matthew's College. Inspired by other renegades such as the Rani, the Master, and the Doctor especially, he took the title of the President as he enjoyed it.
He was an enthusiast of wine and was particularly adept at electronics and cybernetics. He created several black androids and the assassin Amanda, all of whom were shapeshifters. He later made contact with the Garvond and entered into an alliance with it until the Garvond no longer needed him. (PROSE: The Dimension Riders)