I didn't actually audition. But when Jon Pertwee was leaving, the producer Barry Letts - who died quite recently - interviewed a lot of actors, one of whom was me. I went along and sat down and he said 'now then what can you do?' I said 'I'm a very good swimmer, I was a paratrooper, I could fight' - and he said 'Oh no, no fighting no, the Doctor is never seen fighting at all!' So Tom Baker became the next Doctor, and one of the first things I remember him doing was knocking somebody out. (On "Doctor Who" (1963))