Dizi Adı: Doctor Who
Bölüm Adı: The Impossible Astronaut (1)
Sezon/Bölüm: 6. Sezon 1. Bölüm
Yayın Tarihi: 23 Nis. 2011

Placing his life entirely in their hands, the Doctor agrees to search for the recipient of the fourth envelope – just who is Canton Everett Delaware the Third? And what is the relevance of their only other clue: ‘Space 1969’? Their quest lands them – quite literally – in the Oval Office, where they are enlisted by President Nixon himself to assist enigmatic former-FBI agent Canton, in saving a terrified little girl from a mysterious spaceman.