Recovery 7

Recovery 7 was a recovery craft sent up to Mars Probe 7. Its mission was to check on their communication equipment and see if the astronauts were well. Recovery 7 was taken over by alien ambassadors and subsequently flown to Earth. The Third Doctor took control of Recovery 7 to fly up and negotiate with the ambassadors' Leader. In the end the ambassadors were flown up in the craft to re-join their people and the lost astronauts piloted Recovery 7 to Earth. (DW: The Ambassadors of Death)