The Impossible Astronaut, the first episode of Doctor Who's sixth series (or thirty-second season, if you prefer) will air tonight at 6:00pm BST on BBC One in the UK, at 9:00pm Eastern (6:00 Pacific) on BBC America in the USA, and at 8:00pm Eastern (5:00pm Pacific) on SPACE in Canada. US viewers will also be able to purchase episodes from iTunes or Amazon Instant Video.
After the episode airs, viewers in the UK will be able to view My Sarah Jane: A Tribute to Elisabeth Sladen on the CBBC channel. Doctor Who Confidential will follow on BBC Three at 7:00pm.
Finally, to tease the final hours before the debut of The Impossible Astronaut, the BBC's Doctor Who website has posted some potentially spoilerrific photos from the episode, as well as this enigmatic video under a link to "The Silence":