Doctor Who: The First Doctor Unbound: Knights of the Round TARDIS (excerpt)

Thirteenth Century Oxford - courtly love, jousting knights and a golden age of Academia. What a treat for the Doctor and his companions! A chance to meet precursor of English democracy Simon de Montfort, as well as scientist, visionary and Franciscan friar Roger Bacon - a man truly ahead of his time. Truly ahead of his time. If the TARDIS team can't stop him, this time-meddling wolf in Monk's clothing will alter the course of Earth's history. But is it already too late to prevent the timelines becoming unbound for the Doctor and his friends?