Thomas Henry Huxley was a biologist and educator in the England of 19th century. He was called "Darwin's Bulldog" due to his support of Charles Darwin's theory of evolution. (COMIC: Prisoners of Time)
He was a friend of the First Doctor. (COMIC: Prisoners of Time)
In 1868, the First Doctor, Ian Chesterton, Barbara Wright and Vicki Pallister attended a speech by Thomas Huxley at the Royal College of Surgeons. Later, he helped them to fight a colony of Zarbi in the underground of the city. (COMIC: Prisoners of Time)