When William Hartnell retired from the role, he declared that there was only one man who could take over the TARDIS - Patrick Troughton. Its likely this was just a face-saving move on Hartnells part, as Troughton was by no means the only actor considered for the role. Amongst several big names in British character acting, the most interesting possibility is Michael Hordern. Horderns rumpled appearance and scatter-brained demeanour were not a million light years from what the producers eventually settled on in Troughton. There are crucial differences between the two men, however. Where Troughton played the clown, Horderns typical persona was diffident, distracted almost. Where Troughton brought an exuberant physicality to the Doctor, Horderns sort of acting was quieter, more self-contained, and notable in large part for his wonderfully rich voice. For those reasons, it was Troughton that offered the stronger contrast with Hartnell, making him the obvious replacement. Despite not quite fitting the bill for Doctor #2, Hordern eventually found a role that would endear him to millions of young TV viewers, narrating the exploits of everyones favourite ursine Peruvian, Paddington. Perhaps his defining performance, however, was the introverted, fussy Professor Parkin in the BBCs 1968 adaptation of Whistle And Ill Come To You. For that at least, fans should be glad that Patrick Troughton was the only man who could take over the TARDIS.