Mars Probe 6

Mars Probe 6 was a British spacecraft sent on a mission to Mars. Charles Carrington and Jim Daniels were among the crew on the mission. When it arrived on Mars, Daniels was killed when aliens touched him. (TV: The Ambassadors of Death) The probe was later taken to the Vault. (PROSE: The Scales of Injustice)

Behind the scenes
The Mars Probe missions are ignored by the Doctor Who television story The Waters of Mars, which referred to the human colony founded in 2058 as being made up of the "very first humans on Mars".