In the six years since LEGO Mindstorms NXT was released (and four years since NXT 2.0), LEGO has released little beyond the basic kits for building robots. The problem is that the system is so versatile and they have released such limited documentation, which is where books and websites come in. One such book is The Art of LEGO Mindstorms NXT-G Programming by Terry Griffin.
Earlier this summer, I was trying to think of some new ideas to build for the upcoming BrickFair. At the same time, I was watching the new series of Doctor Who and the two ideas came together. An amalgam of the Doctor's time travel device and the Lego bricks with a technological twist was the goal.