This episode goes behind the scenes of Let's Kill Hitler

Achtung! Explosions, vintage bikes, cornfields and time travel make for a mind-boggling start to the second batch of Doctor Who adventures.

Confidential is back on set with Matt Smith and Karen Gillan in 1930s Berlin. We hang out backstage with the cast and crew and bring you all the behind-the-scenes action as the series gets back into full swing.