Amy: So that was the year of the slow invasion. When the Earth got cubed and the Doctor came to stay. It was also when we realized something the Shakri never understood. What cubed actually means. The Power of Three.
The Power Of Three
Amy: So that was the year of the slow invasion. When the Earth got cubed and the Doctor came to stay. It was also when we realized something the Shakri never understood. What cubed actually means. The Power of Three.