Doctor Who returns to BBC One for the second half of Series 6 with ‘Let’s Kill Hitler’ next weekend. Here, showrunner Steven Moffat introduces the upcoming six new episodes…

“The wait is almost over. The second part of the thrilling new series of Doctor Who begins on 27 August 2011.

“The rules have changed, and the game is deadlier than ever. Out in the universe, where the earthly rules of time and space do not apply, Amy and Rory know only too well that their baby daughter needs them. For Melody Pond is destined to become River Song, mysterious archaeologist and convicted murderer – the woman who killed the best man she ever knew…

“The Doctor leads Amy and Rory across centuries and galaxies in a desperate search for baby Melody, but a terrible and inescapable date looms large. At 5.02pm on 22nd April 2011, the Doctor will die. These are his last days, and the quest for Melody his final mission.

“The search will result in a crash landing in Thirties Berlin and will bring them face to face with the greatest war criminal of all time. And Hitler. Old friendships will be tested to their limits as the Doctor suffers the ultimate betrayal and learns a harsh lesson in the cruellest warfare of all.

“A distress call from a terrified little boy will break through all barriers of time and space and lead the Doctor to visit the scariest place in the Universe. George’s bedroom. George is terrorised by every fear you can possibly imagine. Fears that live in his bedroom cupboard. His parents are desperate – George needs a doctor. But allaying George’s fears won’t be easy. Because the monsters in George’s cupboard are real.

“An unscheduled visit to a quarantine facility for victims of an alien plague – a plague that will kill the Doctor in a day – leaves Amy trapped. Alone, Rory must find Amy and bring her back to the TARDIS before the faceless doctors kill her with kindness. But Rory is about to encounter a very different side to his wife.

“In an impossible hotel, the Doctor, Amy and Rory find themselves checked-in but unable to check out. Walls move, corridors twist, rooms vanish and death lies in wait for every visitor. But the Doctor’s time has yet to come. He has one last stop to make on his final journey. His old friend, Craig Owens, desperately needs his help – a new and unfamiliar presence is wreaking havoc in Colchester. And then come the Cybermen. But time catches up with us all and the Doctor can delay no more.

“By the shores of Lake Silencio, in Utah, all of time and space hang in the balance. And a NASA astronaut is waiting…”

> Order the Series 6 Part 2 DVD on Amazon.

> Order the Series 6 Part 2 Blu-ray on Amazon.

Watch the Series 6 Part 2 trailer…