The Eleventh Doctor has forgotten that the alien planet Usunru in Galaxy 57 is home to the Kreech. He and Amy Pond are soon separated from the TARDIS and captured. The Kreech carry their prisoners back to their nest in a hollowed-out tree. They are received by Rangorr — Brainleader of the Kreech! While Rangorr is busy concentrating on the puzzle, the Doctor and Amy sneak out and past the Kreech, back to the TARDIS, leaving Rangorr to remain the Brainleader.