Grant (Day of the Moon)
From Tardis Wiki, the free Doctor Who reference
Mr Grant was a NASA scientist who worked on the Apollo 11 mission. He found the Eleventh Doctor working on the Apollo 11 rocket. He and Gardner questioned the Doctor and threatened to imprison him. President Nixon, River, and Rory then came and spoke to Gardner and Grant, and convinced them to let the Doctor go. (TV: Day of the Moon)
