Neil Armstrong

Neil Armstrong was an American astronaut and a member of Apollo 11 mission. As far as the majority of humanity was aware, he was the first man to walk on the Moon on 20 July 1969. (DW: Day of the Moon, MA: Who Killed Kennedy)

The Eleventh Doctor interfered with the transmission of the Moon landing with the help of the former FBI agent Canton Delaware. At the crucial moment that Armstrong set foot on the Moon, they inserted footage of a Silent ordering for its kind to be killed on sight. (DW: Day of the Moon)

Martha Jones claimed that she and the Tenth Doctor had witnessed Armstrong walking on the Moon four times. (DW: Blink)