On the planet Marinus, the Doctor and his companions are enlisted by Arbitan to seek out the keys to an ancient and powerful machine. Their quest takes them across time and space; will they be able to return the keys before Marinus falls under the control of the alien Voord? (Originally broadcast in six parts.) Written by
Did You Know?
Fans voted this number 126 in a countdown of the 163 Doctor Who
(1963) stories in Outpost Gallifrey's 40th anniversary poll in 2003. See more
After the Doctor goes into the pyramid, someone's leg appears on the lower right side of the screen just before the shot ends. See more
It's Barbara's travel dial. Look! There's blood on it!