Boolin was a physician who was treating the Tsarina's son. He thought that his patient's robotic parts were rejecting the human parts. (AUDIO: Tsar Wars)
When he escaped through a wormhole, he crashed and lost his memory. When the Fourth Doctor met up with him, he remembered his true life. (AUDIO: The Broken Crown)
After falling into the world inside the Skishtari egg, he became the magician and sent Andrewon on a mission to find the magic lamp. (AUDIO: Aladdin Time)