Before Baker, Davison played the Time Lord. His era was notable for taking the show back to basics, reducing "silly" humour and horror in favour of a more scientific accuracy.

Fun fact: At the time, Davison was the youngest actor to play the Doctor, aged 29.

When he revisited the role for 'Time Crash' in 2007, he was 56, the same age that William Hartnell was when he took up the role in 1963.