"In the 13th century, (TV: The Sontaran Experiment) Sarah Jane Smith, believing the Third Doctor took scientists out of the 20th century to help Irongron in this time period, gave Sir Edward and Eleanor the idea to raid Irongron's castle with their men to bring the Doctor to Wessex Castle."
Presumably this clumsy sentence should actually refer to The Time Warrior188.8.131.52talk to me 13:31, March 7, 2018 (UTC)
Clumsy sentence aside, The Sontaran Experiment is the episode that clarifies the 13th century, so that's why it's cited how and where it is. Please see Tardis:Citation for the proper way to cite in-universe articles. Shambala108☎ 14:16, May 30, 2018 (UTC)