 On that occasion he wore the guise of a monk in order to gain the trust of the 11th-century locals of Northumbria, hence the name by which he became known.The Doctor stranded the Monk in the 11th century by stealing his TARDIS's dimensional controller, which reduced the interior dimensions of the time machine to minuscule size.The character eventually restored his ship and tracked the Doctor to a volcanic planet, where he attempted to maroon his enemy by destroying the Doctor's TARDIS's lock with his laser screwdriver.