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21st century Earth is entirely dependent on the T-Mat transport system but the control centre on the moon has stopped functioning. Meanwhile, the Doctor, Jamie and Zoe meet the one man who can solve the crisis.
Did You Know?
This episode takes place in London and on the Moon in the 21st Century. See more
The Doctor's sideburns disappear and reappear during the episodes (this is due to the fact that Patrick Troughton
was given a week's vacation in the middle of the studio recordings). See more
Bombay-Tokyo shipment activated. Bombay sending now. Tokyo receiving now. Dispatch completed. New York to Moscow delayed, Moonbase clearance awaited. Stockholm-Washington personnel transportation, Stockholm sending now. Washing receiving now. Dispatch completed. Non arrival, shipment of synthetic protein, New York to Moscow, Moonbase clearance awaited.