Harry Potter and the Deathly Hallows: Chapter 4, page 47; Harry could not help but agree with the unknown Thicknesse. "So what are we going to do?"
"Apparently Dumbledore had a backup plan for if whatever you two were planning didn't work." Mad-Eye replied gruffly. "What backup plan," Harry questioned. "Mcgonagall found the plans while going through Dumbledore's office." "Well then what's the new plan?" Everyone looked at each other daring the other to be the one to tell The Boy Who Lived what his next mission would be. After several minutes of silence Hermione was the one who stood up and answered Harry. "Harry, you will be time traveling."