Sky vessel

A spaceship with a complement of robot drones, observed by the Twelfth Doctor to have originated from the 29th century, crash landed on Earth in the past while on a destination to the Promised Land. The ship would later surface as the castle of Nottingham in 1190 England. By this point, the robots, masquerading as Medieval knights, served the Sheriff of Nottingham, converted into a cyborg and aspiring to take the English throne. (TV: Robot of Sherwood)