Gary Russell wrote the Rassilon sequences of Paul McGann's audios with Christopher Lee in mind and sent it to his agent.

Gary Russell said : “But his agent laughed at me. Apparently there was no way he'd do anything as silly as Doctor Who. We'd actually written Rassilon with Christopher Lee in mind, so I was quite disappointed. I thought 'Of course, he's a fantastic actor, but he's done so crap in his time.' To be told he wouldn't even consider doing Doctor Who – well, I thought that was quite a strange reaction.”

So it ended up being performed by Don Warrington, the role would later be played by Timothy Dalton.