When the Third Doctor encountered the Sontaran, Linx on Earth in the 13th century, he informed Linx that he was a Time Lord from Gallifrey. The Sontaran revealed that he knew of the Doctor's world and people. Linx considered the Time Lords to be "a race of great technical achievement, but lacking the morale to withstand a determined assault" — which made the Doctor invite him to "put that theory to the test". (TV: The Time Warrior)