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?
This six-part serial was released by the BBC on video cassette in the UK in March 1999. See more
The model used in place of the Voord falling to its doom turns sideways as it falls, revealing that it is a two-dimensional cut-out. See more
For the sake of all my people, I hope you succeed.
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