BBC have revealed on the Official Facebook account that Doctor Who – Asylum of the Daleks will air on the same day in the USA and Canada as the UK, the information is confirmed on BBC America’s site here:
BBC AMERICA’s “Doctor Who†returns after a record-breaking season with five blockbuster episodes on September 1 as part of Supernatural Saturday. Join the Doctor, his companions Amy and Rory (aka the Ponds) and numerous friends on their latest escapades through space and time where they puzzle an unexpected invasion of Earth, save a spaceship full of dinosaurs, don Stetsons in a Wild Wild West adventure and are even kidnapped by the Doctor’s oldest foe. The explosive series concludes with Amy and Rory’s heart-breaking farewell – a race against time through the streets of Manhattan. Will the Doctor really lose the Ponds forever? There’s only one way to find out… “Doctor Who†premieres Saturday, September 1, 9:00pm ET as part of Supernatural Saturday.
The series  7 premier airs at 7.20pm on BBC 1 and BBC One HD in the UK. On Canada, it is also announced to air on the SPACE channel at 9pm ET.
01 September 2012 – Asylum of the Daleks (by Steve Moffat)
08 September 2012 - Dinosaurs on a Spaceship (by Chris Chibnall)
15 September 2012 - A Town Called Mercy (by Toby Whithouse)
22 September 2012 - The Power of Three  (by Chris Chibnall)
29 September 2012 - The Angels Take Manhattan (by Steven Moffat)
2013 Season 7, Episode 6
2013 Season 7, Episode 7
Until then remember to watch the Life of Ponds mini-series.
