The Prime Minister of the Daleks ordered the abduction of the Eleventh Doctor and his companions Amy Pond and Rory Williams, summoning them to the Parliament of the Daleks and granting them a mission to lower the indestructible force field of the Dalek Asylum.
Once this had been achieved by Oswin Oswald (a human-turned-Dalek), the Parliament launched numerous missiles and successfully destroyed the entire planet. But just beforehand, Oswin erased all information about the Doctor from the pathweb (memory) of the New Dalek Paradigm. The members of the Parliament were therefore unable to recognize him when the Doctor teleported onto the vessel, and they repeatedly asked the First Question: "Doctor Who?". Moments before the Doctor escaped from their vessel in his TARDIS, he recognized this was a watershed moment in his history with his worst enemies, and he thanked Oswin for accomplishing this. (TV: Asylum of the Daleks)